{"id":111983,"date":"2026-10-02T10:58:08","date_gmt":"2026-10-02T02:58:08","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/111983.html"},"modified":"2026-10-02T10:58:08","modified_gmt":"2026-10-02T02:58:08","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3%e6%8c%87%e9%92%886","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/111983.html","title":{"rendered":"\u6df1\u5165\u7406\u89e3\u6307\u94886"},"content":{"rendered":"<h2>\u6df1\u5165\u7406\u89e3\u6307\u9488&#xff08;\u516d&#xff09;&#xff1a;sizeof \u4e0e strlen \u8fa8\u6790\u53ca\u6307\u9488\u8fd0\u7b97\u901a\u5173<\/h2>\n<h3>\u524d\u8a00<\/h3>\n<p>\u5728\u524d\u51e0\u7bc7\u300a\u6df1\u5165\u7406\u89e3\u6307\u9488\u300b\u7cfb\u5217\u4e2d&#xff0c;\u6211\u4eec\u7cfb\u7edf\u68b3\u7406\u4e86\u5b57\u7b26\u6307\u9488\u3001\u6570\u7ec4\u6307\u9488\u3001\u51fd\u6570\u6307\u9488\u3001\u56de\u8c03\u51fd\u6570\u4ee5\u53ca qsort \u7684\u6a21\u62df\u5b9e\u73b0\u3002\u6307\u9488\u7684\u6838\u5fc3\u5728\u4e8e\u5bf9\u5185\u5b58\u5e03\u5c40\u548c\u7c7b\u578b\u6b65\u957f\u7684\u7cbe\u51c6\u628a\u63a7\u3002\u672c\u7bc7\u4f5c\u4e3a\u6307\u9488\u7cfb\u5217\u7684\u6559\u5b66\u8bfe\u4ef6&#xff0c;\u5c06\u56f4\u7ed5\u4e09\u4e2a\u6838\u5fc3\u4e3b\u9898\u5c55\u5f00&#xff1a;sizeof \u4e0e strlen \u7684\u672c\u8d28\u533a\u522b\u3001\u6570\u7ec4\u4e0e\u6307\u9488\u7684\u7ecf\u5178\u7b14\u8bd5\u9898\u3001\u6307\u9488\u8fd0\u7b97\u3002<\/p>\n<hr \/>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025804-6abf1dbcd1748.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u76ee\u5f55<\/h3>\n<ul>\n<li>\u4e00\u3001sizeof \u548c strlen \u7684\u5bf9\u6bd4\n<ul>\n<li>1.1 \u672c\u8d28\u533a\u522b<\/li>\n<li>1.2 \u539f\u521b\u793a\u4f8b\u4ee3\u7801<\/li>\n<li>1.3 \u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u7ec6\u8282<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u6570\u7ec4\u548c\u6307\u9488\u7b14\u8bd5\u9898\u89e3\u6790\n<ul>\n<li>2.1 \u4e00\u7ef4\u6570\u7ec4<\/li>\n<li>2.2 \u5b57\u7b26\u6570\u7ec4\u4e0e\u5b57\u7b26\u6307\u9488<\/li>\n<li>2.3 \u4e8c\u7ef4\u6570\u7ec4<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u6307\u9488\u8fd0\u7b97\u7b14\u8bd5\u9898\u89e3\u6790\n<ul>\n<li>3.1 \u6307\u9488\u7c7b\u578b\u51b3\u5b9a\u6b65\u957f<\/li>\n<li>3.2 \u7ed3\u6784\u4f53\u6307\u9488\u504f\u79fb\u4e0e\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362<\/li>\n<li>3.3 \u9017\u53f7\u8868\u8fbe\u5f0f\u9677\u9631<\/li>\n<li>3.4 \u6307\u9488\u76f8\u51cf&#xff1a;\u5143\u7d20\u4e2a\u6570\u800c\u975e\u5b57\u8282\u5dee<\/li>\n<li>3.5 \u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6307\u9488\u504f\u79fb<\/li>\n<li>3.6 \u6307\u9488\u6570\u7ec4\u4e0e\u4e8c\u7ea7\u6307\u9488<\/li>\n<li>3.7 \u591a\u7ea7\u6307\u9488\u7684\u5185\u5b58\u8ffd\u8e2a<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u603b\u7ed3<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e00\u3001sizeof \u548c strlen \u7684\u5bf9\u6bd4<\/h3>\n<h4>1.1 \u672c\u8d28\u533a\u522b<\/h4>\n<p>sizeof \u662f C \u8bed\u8a00\u4e2d\u7684\u4e00\u4e2a\u5355\u76ee\u64cd\u4f5c\u7b26&#xff08;\u5173\u952e\u5b57&#xff09;&#xff0c;\u800c strlen \u662f\u4e00\u4e2a\u5e93\u51fd\u6570&#xff0c;\u8fd9\u662f\u5b83\u4eec\u6700\u6839\u672c\u7684\u533a\u522b\u3002\u5f88\u591a\u4eba\u521d\u5b66\u65f6\u4f1a\u8bef\u4ee5\u4e3a sizeof \u662f\u51fd\u6570&#xff0c;\u5b9e\u9645\u4e0a\u5b83\u662f\u7531\u7f16\u8bd1\u5668\u76f4\u63a5\u5904\u7406\u7684\u3002<\/p>\n<table>\n<tr>\u5bf9\u6bd4\u9879sizeofstrlen<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">\u672c\u8d28<\/td>\n<td align=\"left\">\u5355\u76ee\u64cd\u4f5c\u7b26&#xff08;\u5173\u952e\u5b57&#xff09;<\/td>\n<td align=\"left\">\u5e93\u51fd\u6570&#xff08;\u9700 &lt;string.h&gt;&#xff09;<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u6c42\u503c\u65f6\u673a<\/td>\n<td align=\"left\">\u7f16\u8bd1\u671f<\/td>\n<td align=\"left\">\u8fd0\u884c\u671f<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u529f\u80fd<\/td>\n<td align=\"left\">\u8ba1\u7b97\u53d8\u91cf\u6216\u7c7b\u578b\u5360\u7528\u7684\u5b57\u8282\u6570<\/td>\n<td align=\"left\">\u7edf\u8ba1\u5b57\u7b26\u4e32\u4e2d \\\\0 \u4e4b\u524d\u7684\u5b57\u7b26\u4e2a\u6570<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u5173\u6ce8\u70b9<\/td>\n<td align=\"left\">\u53ea\u5173\u5fc3\u5185\u5b58\u7a7a\u95f4\u5927\u5c0f&#xff0c;\u4e0d\u5173\u5fc3\u5185\u5bb9<\/td>\n<td align=\"left\">\u5173\u5fc3\u5185\u5b58\u4e2d\u662f\u5426\u6709 \\\\0&#xff0c;\u65e0 \\\\0 \u4f1a\u8d8a\u754c<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u8fd4\u56de\u503c\u7c7b\u578b<\/td>\n<td align=\"left\">size_t<\/td>\n<td align=\"left\">size_t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>1.2 \u539f\u521b\u793a\u4f8b\u4ee3\u7801<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> num <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0x12345678<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(num) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>num<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ 4&#xff1a;\u6574\u578b\u5927\u5c0f<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof num &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span> num<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 4&#xff1a;sizeof \u662f\u64cd\u4f5c\u7b26&#xff0c;\u53ef\u7701\u7565\u62ec\u53f7<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(long) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">long<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 4 \u6216 8&#xff0c;\u53d6\u51b3\u4e8e\u5e73\u53f0<\/span><\/p>\n<p>    <span class=\"token keyword\">char<\/span> text1<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;C pointer&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> text2<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token char\">&#039;C&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039; &#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;p&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;o&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;i&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;n&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;t&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;e&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;r&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>text3 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;C pointer&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(text1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>text1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 10&#xff1a;\u5305\u542b\u7ed3\u5c3e\u7684 &#039;\\\\0&#039;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;strlen(text1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>text1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 9&#xff1a;\u4e0d\u5305\u542b &#039;\\\\0&#039;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(text2) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>text2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 9&#xff1a;\u6570\u7ec4\u672c\u8eab\u5927\u5c0f<\/span><br \/>\n    <span class=\"token comment\">\/\/ printf(&#034;strlen(text2) &#061; %zu\\\\n&#034;, strlen(text2)); \/\/ \u5371\u9669&#xff01;\u65e0 &#039;\\\\0&#039;&#xff0c;\u8d8a\u754c\u67e5\u627e&#xff0c;\u7ed3\u679c\u968f\u673a<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(text3) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>text3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u6307\u9488\u5927\u5c0f<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;strlen(text3) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>text3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 9&#xff1a;\u5b57\u7b26\u4e32\u957f\u5ea6<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*text3) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>text3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 1&#xff1a;\u5b57\u7b26 &#039;C&#039; \u7684\u5927\u5c0f<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025806-6abf1dbea1a5e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u63d0\u793a&#xff1a;strlen \u7684\u53c2\u6570\u5fc5\u987b\u662f char * \u7c7b\u578b\u3002\u5982\u679c\u4f20\u5165 *text3&#xff08;\u5373\u5b57\u7b26 &#039;C&#039;&#xff0c;ASCII \u503c\u4e3a 67&#xff09;&#xff0c;strlen \u4f1a\u628a 67 \u5f53\u4f5c\u5730\u5740\u53bb\u8bbf\u95ee\u5185\u5b58&#xff0c;\u5bfc\u81f4\u6bb5\u9519\u8bef\u3002\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u9690\u853d\u7684\u9677\u9631\u2014\u2014\u7f16\u8bd1\u5668\u4e0d\u4f1a\u62a5\u9519&#xff0c;\u4f46\u8fd0\u884c\u65f6\u4f1a\u5d29\u6e83\u3002<\/p>\n<h4>1.3 \u4e00\u4e2a\u5bb9\u6613\u88ab\u5ffd\u7565\u7684\u7ec6\u8282<\/h4>\n<p>sizeof \u5728\u8ba1\u7b97\u8868\u8fbe\u5f0f\u5927\u5c0f\u65f6&#xff0c;\u5982\u679c\u8868\u8fbe\u5f0f\u5305\u542b\u51fd\u6570\u8c03\u7528&#xff0c;\u51fd\u6570\u5e76\u4e0d\u4f1a\u88ab\u771f\u6b63\u6267\u884c&#xff0c;\u56e0\u4e3a sizeof \u5728\u7f16\u8bd1\u671f\u5c31\u80fd\u6839\u636e\u7c7b\u578b\u786e\u5b9a\u7ed3\u679c\u3002\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">get_length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8be5\u51fd\u6570\u88ab\u8c03\u7528\u4e86&#xff01;\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(len &#043; get_length()) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>len <span class=\"token operator\">&#043;<\/span> <span class=\"token function\">get_length<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8f93\u51fa\u4e3a 4&#xff0c;\u4e14\u4e0d\u4f1a\u6253\u5370&#034;\u8be5\u51fd\u6570\u88ab\u8c03\u7528\u4e86&#xff01;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025806-6abf1dbed6cb1.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u8fd9\u4e00\u7279\u6027\u518d\u6b21\u5370\u8bc1\u4e86 sizeof \u7684\u7f16\u8bd1\u671f\u672c\u8d28&#xff0c;\u4e0e strlen \u7684\u8fd0\u884c\u671f\u6c42\u503c\u5f62\u6210\u9c9c\u660e\u5bf9\u6bd4\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001\u6570\u7ec4\u548c\u6307\u9488\u7b14\u8bd5\u9898\u89e3\u6790<\/h3>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;\u6570\u7ec4\u540d\u5728\u5927\u591a\u6570\u8868\u8fbe\u5f0f\u4e2d\u4f1a\u9000\u5316\u4e3a\u9996\u5143\u7d20\u5730\u5740&#xff0c;\u4f46\u6709\u4e24\u4e2a\u4f8b\u5916&#xff1a;<\/p>\n<li>sizeof(\u6570\u7ec4\u540d)&#xff1a;\u6b64\u65f6\u6570\u7ec4\u540d\u4ee3\u8868\u6574\u4e2a\u6570\u7ec4&#xff0c;\u8ba1\u7b97\u6574\u4e2a\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/li>\n<li>&amp;\u6570\u7ec4\u540d&#xff1a;\u6b64\u65f6\u6570\u7ec4\u540d\u4ee3\u8868\u6574\u4e2a\u6570\u7ec4&#xff0c;\u53d6\u51fa\u7684\u662f\u6574\u4e2a\u6570\u7ec4\u7684\u5730\u5740\u3002<\/li>\n<h4>2.1 \u4e00\u7ef4\u6570\u7ec4<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">double<\/span> d<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4.5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(d) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ 32&#xff1a;\u6574\u4e2a\u6570\u7ec4&#xff0c;4 * 8<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(d &#043; 0) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>d <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;d \u9000\u5316\u4e3a double*&#xff0c;\u6307\u9488\u5927\u5c0f<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*d) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ 8&#xff1a;\u9996\u5143\u7d20 double<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(d &#043; 2) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>d <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u6307\u5411\u7b2c\u4e09\u4e2a\u5143\u7d20\u7684\u6307\u9488<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(d[2]) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>d<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ 8&#xff1a;\u7b2c\u4e09\u4e2a\u5143\u7d20 double<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(&amp;d) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u6574\u4e2a\u6570\u7ec4\u7684\u5730\u5740&#xff0c;\u6570\u7ec4\u6307\u9488<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*&amp;d) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">&amp;<\/span>d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 32&#xff1a;*&amp;d \u7b49\u4ef7\u4e8e d&#xff0c;\u6574\u4e2a\u6570\u7ec4<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(&amp;d &#043; 1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>d <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u8df3\u8fc7\u6574\u4e2a\u6570\u7ec4\u540e\u7684\u6307\u9488<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(&amp;d[0] &#043; 1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>d<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u6307\u5411\u7b2c\u4e8c\u4e2a\u5143\u7d20\u7684\u6307\u9488<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025806-6abf1dbee80db.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;d \u548c &amp;d \u7684\u503c\u76f8\u540c&#xff0c;\u4f46\u7c7b\u578b\u4e0d\u540c\u3002d &#043; 1 \u8df3\u8fc7 8 \u4e2a\u5b57\u8282&#xff08;\u4e00\u4e2a double&#xff09;&#xff0c;\u800c &amp;d &#043; 1 \u8df3\u8fc7 32 \u4e2a\u5b57\u8282&#xff08;\u6574\u4e2a\u6570\u7ec4&#xff09;\u3002\u7406\u89e3\u8fd9\u4e00\u70b9\u7684\u5173\u952e\u5728\u4e8e\u533a\u5206\u6307\u9488\u7684\u503c\u548c\u6307\u9488\u7684\u7c7b\u578b&#xff1a;\u503c\u76f8\u540c\u4e0d\u4ee3\u8868\u884c\u4e3a\u76f8\u540c&#xff0c;\u7c7b\u578b\u624d\u51b3\u5b9a\u4e86\u6307\u9488\u7684\u6b65\u957f\u3002<\/p>\n<h4>2.2 \u5b57\u7b26\u6570\u7ec4\u4e0e\u5b57\u7b26\u6307\u9488<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> s1<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> s2<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token char\">&#039;h&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;e&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;l&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;l&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token char\">&#039;o&#039;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>s3 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(s1) &#061; %zu, strlen(s1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>s1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>s1<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 6, 5<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(s2) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>s2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 5<\/span><br \/>\n    <span class=\"token comment\">\/\/ strlen(s2) \u672a\u5b9a\u4e49&#xff0c;\u56e0\u4e3a s2 \u6ca1\u6709 &#039;\\\\0&#039;&#xff0c;\u4e0d\u6f14\u793a<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(s3) &#061; %zu, strlen(s3) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>s3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strlen<\/span><span class=\"token punctuation\">(<\/span>s3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 8\/4, 5<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*s3) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>s3<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 1<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbf21bcf.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;\u5b57\u7b26\u6570\u7ec4 s1 \u7531\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\u521d\u59cb\u5316\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5728\u672b\u5c3e\u6dfb\u52a0 \\\\0&#xff0c;\u56e0\u6b64 sizeof(s1) \u4e3a 6\u3002\u800c s2 \u4f7f\u7528\u521d\u59cb\u5316\u5217\u8868\u9010\u5b57\u7b26\u8d4b\u503c&#xff0c;\u6ca1\u6709\u9690\u5f0f\u7684 \\\\0&#xff0c;sizeof(s2) \u4e3a 5&#xff0c;\u5bf9\u5176\u8c03\u7528 strlen \u5c5e\u4e8e\u672a\u5b9a\u4e49\u884c\u4e3a\u3002<\/p>\n<h4>2.3 \u4e8c\u7ef4\u6570\u7ec4<\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">short<\/span> mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(mat) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mat<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/\/ 12&#xff1a;2 * 3 * 2<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(mat[0]) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ 6&#xff1a;\u7b2c\u4e00\u884c&#xff0c;3 * 2<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(mat[0][0]) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 2&#xff1a;\u4e00\u4e2a short<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(mat &#043; 1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mat <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u884c\u6307\u9488<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*(mat &#043; 1)) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span>mat <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 6&#xff1a;\u7b2c\u4e8c\u884c\u6570\u7ec4<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(&amp;mat[0] &#043; 1) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 8 \u6216 4&#xff1a;\u884c\u6307\u9488<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(*(&amp;mat[0] &#043; 1)) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 6&#xff1a;\u7b49\u4ef7\u4e8e mat[1]<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(mat[1]) &#061; %zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>mat<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/\/ 6&#xff1a;\u7b2c\u4e8c\u884c\u6570\u7ec4<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbf4716a.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;\u4e8c\u7ef4\u6570\u7ec4 mat \u662f\u4e00\u7ef4\u6570\u7ec4\u7684\u6570\u7ec4\u3002mat \u9000\u5316\u4e3a\u6307\u5411\u7b2c\u4e00\u884c\u7684\u6307\u9488&#xff0c;\u7c7b\u578b\u4e3a short (*)[3]&#xff0c;\u6b65\u957f\u662f\u4e00\u6574\u884c&#xff08;6 \u5b57\u8282&#xff09;\u3002mat &#043; 1 \u8df3\u8fc7\u7b2c\u4e00\u884c&#xff0c;\u6307\u5411\u7b2c\u4e8c\u884c\u7684\u8d77\u59cb\u5730\u5740&#xff1b;\u800c *(mat &#043; 1) \u89e3\u5f15\u7528\u540e\u5f97\u5230\u7b2c\u4e8c\u884c\u8fd9\u4e2a\u4e00\u7ef4\u6570\u7ec4&#xff0c;\u5927\u5c0f\u4e3a 6 \u5b57\u8282\u3002<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u6307\u9488\u8fd0\u7b97\u7b14\u8bd5\u9898\u89e3\u6790<\/h3>\n<p>\u6307\u9488\u8fd0\u7b97\u7684\u6838\u5fc3\u5728\u4e8e\u7c7b\u578b\u51b3\u5b9a\u6b65\u957f\u3002\u300aC\u548c\u6307\u9488\u300b\u4e2d\u53cd\u590d\u5f3a\u8c03&#xff1a;\u6307\u9488\u7684\u7b97\u672f\u8fd0\u7b97\u4e0d\u662f\u7b80\u5355\u7684\u6574\u6570\u52a0\u51cf&#xff0c;\u800c\u662f\u4ee5\u6307\u9488\u6240\u6307\u5411\u7c7b\u578b\u7684\u5927\u5c0f\u4e3a\u5355\u4f4d\u8fdb\u884c\u79fb\u52a8\u7684\u3002\u7406\u89e3\u8fd9\u4e00\u70b9&#xff0c;\u662f\u7834\u89e3\u6240\u6709\u6307\u9488\u8fd0\u7b97\u9898\u76ee\u7684\u5173\u952e\u3002<\/p>\n<h4>3.1 \u6307\u9488\u7c7b\u578b\u51b3\u5b9a\u6b65\u957f<\/h4>\n<p>\u9898\u76ee&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> arr<span class=\"token punctuation\">[<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">40<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">60<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>arr <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span>p <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbf714c9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u7684\u5173\u952e\u5728\u4e8e\u533a\u5206 arr \u548c &amp;arr \u7684\u7c7b\u578b\u5dee\u5f02\u3002arr \u4f5c\u4e3a\u6570\u7ec4\u540d&#xff0c;\u5728\u53c2\u4e0e\u8fd0\u7b97\u65f6\u9000\u5316\u4e3a\u6307\u5411\u9996\u5143\u7d20\u7684\u6307\u9488&#xff0c;\u7c7b\u578b\u4e3a int *&#xff0c;\u6b65\u957f\u4e3a 4 \u5b57\u8282\u3002\u800c &amp;arr \u53d6\u51fa\u7684\u662f\u6574\u4e2a\u6570\u7ec4\u7684\u5730\u5740&#xff0c;\u7c7b\u578b\u4e3a int (*)[6]&#xff0c;\u6b65\u957f\u4e3a\u6574\u4e2a\u6570\u7ec4\u7684\u5927\u5c0f\u2014\u201424 \u5b57\u8282\u3002<\/p>\n<p>\u56e0\u6b64 &amp;arr &#043; 1 \u4ece\u6570\u7ec4\u9996\u5730\u5740\u51fa\u53d1&#xff0c;\u8df3\u8fc7\u5b8c\u6574\u7684 24 \u5b57\u8282&#xff0c;\u6307\u5411\u6570\u7ec4\u672b\u5c3e\u4e4b\u540e\u7684\u4f4d\u7f6e\u3002\u8fd9\u4e2a\u4f4d\u7f6e\u672c\u8eab\u4e0d\u80fd\u89e3\u5f15\u7528&#xff0c;\u4f46\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u5f3a\u5236\u8f6c\u6362\u4e3a int * \u7c7b\u578b\u7684\u6307\u9488 p\u3002\u6b64\u65f6 p \u7684\u6b65\u957f\u4ece 24 \u5b57\u8282\u53d8\u4e3a\u4e86 4 \u5b57\u8282\u3002<\/p>\n<p>p &#8211; 2 \u8868\u793a\u4ece\u6570\u7ec4\u672b\u5c3e\u4e4b\u540e\u7684\u4f4d\u7f6e\u5411\u524d\u79fb\u52a8 2 \u4e2a int&#xff0c;\u5373 8 \u5b57\u8282\u3002\u8fd9\u4e2a\u4f4d\u7f6e\u6307\u5411\u6570\u7ec4\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a\u5143\u7d20&#xff0c;\u4e5f\u5c31\u662f 50\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;50<\/p>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;\u6307\u9488\u7684\u6b65\u957f\u7531\u6307\u9488\u7684\u7c7b\u578b\u51b3\u5b9a&#xff0c;\u800c\u4e0d\u662f\u7531\u5b83\u5f53\u524d\u6307\u5411\u7684\u6570\u636e\u51b3\u5b9a\u3002(int *)(&amp;arr &#043; 1) \u5148\u5b8c\u6210\u4e86&#034;\u8df3\u8fc7\u6574\u4e2a\u6570\u7ec4&#034;\u7684\u64cd\u4f5c&#xff0c;\u518d\u901a\u8fc7\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u5c06\u6b65\u957f\u6539\u56de 4 \u5b57\u8282&#xff0c;\u5b9e\u73b0\u4e86\u4ece\u6570\u7ec4\u5c3e\u90e8\u53cd\u5411\u8bbf\u95ee\u7684\u80fd\u529b\u3002<\/p>\n<h4>3.2 \u7ed3\u6784\u4f53\u6307\u9488\u504f\u79fb\u4e0e\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362<\/h4>\n<p>\u9898\u76ee&#xff1a;\u5047\u8bbe\u5728 32 \u4f4d\u73af\u5883\u4e0b&#xff0c;\u7ed3\u6784\u4f53\u5b9a\u4e49\u5982\u4e0b&#xff0c;\u8bf7\u8ba1\u7b97\u5404\u8868\u8fbe\u5f0f\u7684\u503c\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Test<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> Num<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>pcName<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">short<\/span> sDate<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> cha<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">short<\/span> sBa<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Test<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token number\">0x100000<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">0x1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span><span class=\"token punctuation\">)<\/span>p <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">0x1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%p\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>p <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">0x1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbf800a6.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u7684\u5b9e\u8d28\u662f\u8003\u5bdf\u540c\u4e00\u4e2a\u5730\u5740\u503c\u5728\u4e0d\u540c\u7c7b\u578b\u4e0b\u7684\u4e0d\u540c\u89e3\u91ca\u3002p \u88ab\u521d\u59cb\u5316\u4e3a 0x100000&#xff0c;\u4f46\u5b83\u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u6307\u9488&#xff0c;\u5b83\u7684\u6b65\u957f\u7531 sizeof(struct Test) \u51b3\u5b9a\u3002<\/p>\n<p>\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f p &#043; 0x1&#xff1a;p \u662f struct Test * \u7c7b\u578b&#xff0c;p &#043; 1 \u8868\u793a\u8df3\u8fc7\u4e00\u6574\u4e2a\u7ed3\u6784\u4f53\u3002\u6839\u636e\u9898\u76ee\u6761\u4ef6&#xff0c;\u7ed3\u6784\u4f53\u5927\u5c0f\u4e3a 20 \u5b57\u8282&#xff0c;\u56e0\u6b64 0x100000 &#043; 20 \u5f97\u5230 0x100014\u3002<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u8868\u8fbe\u5f0f (unsigned long)p &#043; 0x1&#xff1a;\u6307\u9488\u88ab\u5f3a\u5236\u8f6c\u6362\u4e3a\u65e0\u7b26\u53f7\u957f\u6574\u578b&#xff0c;\u4e0d\u518d\u662f\u6307\u9488&#xff0c;\u800c\u662f\u666e\u901a\u7684\u6574\u6570\u3002\u6574\u6570\u52a0 1 \u5c31\u662f\u6570\u503c\u52a0 1&#xff0c;\u7ed3\u679c\u5c31\u662f 0x100001\u3002<\/p>\n<p>\u7b2c\u4e09\u4e2a\u8868\u8fbe\u5f0f (unsigned int *)p &#043; 0x1&#xff1a;\u6307\u9488\u88ab\u5f3a\u5236\u8f6c\u6362\u4e3a unsigned int * \u7c7b\u578b&#xff0c;\u6b65\u957f\u53d8\u4e3a 4 \u5b57\u8282\u30020x100000 &#043; 4 \u5f97\u5230 0x100004\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;0x100014\u30010x100001\u30010x100004<\/p>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;\u6307\u9488\u7684\u7c7b\u578b\u51b3\u5b9a\u4e86 &#043;1 \u7684\u542b\u4e49\u3002struct Test * \u7684 &#043;1 \u662f\u52a0 20 \u5b57\u8282&#xff0c;unsigned long \u7684 &#043;1 \u662f\u52a0 1&#xff0c;unsigned int * \u7684 &#043;1 \u662f\u52a0 4 \u5b57\u8282\u3002<\/p>\n<h4>3.3 \u9017\u53f7\u8868\u8fbe\u5f0f\u9677\u9631<\/h4>\n<p>\u9898\u76ee&#xff1a;\u4ee5\u4e0b\u4ee3\u7801\u8f93\u51fa\u4ec0\u4e48&#xff1f;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">;<\/span><br \/>\n    p <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d&#034;<\/span><span class=\"token punctuation\">,<\/span> p<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbf93010.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u7684\u9677\u9631\u5728\u4e8e\u521d\u59cb\u5316\u5217\u8868\u7684\u5199\u6cd5\u3002(0, 1) \u4f7f\u7528\u7684\u662f\u5c0f\u62ec\u53f7\u800c\u4e0d\u662f\u5927\u62ec\u53f7\u3002\u5728 C \u8bed\u8a00\u4e2d&#xff0c;\u5c0f\u62ec\u53f7\u5185\u7684\u9017\u53f7\u662f\u9017\u53f7\u8868\u8fbe\u5f0f&#xff0c;\u5b83\u4f1a\u4f9d\u6b21\u8ba1\u7b97\u6bcf\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c&#xff0c;\u6700\u7ec8\u8fd4\u56de\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u3002<\/p>\n<p>\u56e0\u6b64 (0, 1) \u7684\u7ed3\u679c\u662f 1&#xff0c;(2, 3) \u7684\u7ed3\u679c\u662f 3&#xff0c;(4, 5) \u7684\u7ed3\u679c\u662f 5\u3002\u6570\u7ec4\u5b9e\u9645\u4e0a\u88ab\u521d\u59cb\u5316\u4e3a&#xff1a;<\/p>\n<p>a[0][0] &#061; 1, a[0][1] &#061; 3<br \/>\na[1][0] &#061; 5, a[1][1] &#061; 0<br \/>\na[2][0] &#061; 0, a[2][1] &#061; 0<\/p>\n<p>p &#061; a[0] \u8ba9 p \u6307\u5411\u6570\u7ec4\u7b2c\u4e00\u884c\u7684\u9996\u5143\u7d20\u3002p[0] \u5c31\u662f a[0][0]&#xff0c;\u5373 1\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;1<\/p>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;\u4e8c\u7ef4\u6570\u7ec4\u521d\u59cb\u5316\u65f6&#xff0c;\u5fc5\u987b\u4f7f\u7528\u5d4c\u5957\u7684\u5927\u62ec\u53f7 {{0, 1}, {2, 3}, {4, 5}} \u624d\u80fd\u6b63\u786e\u521d\u59cb\u5316\u3002\u4f7f\u7528\u5c0f\u62ec\u53f7\u4f1a\u88ab\u7f16\u8bd1\u5668\u89e3\u91ca\u4e3a\u9017\u53f7\u8868\u8fbe\u5f0f&#xff0c;\u6570\u636e\u4f1a\u9519\u4f4d\u3002\u8fd9\u4e2a\u9677\u9631\u4e5f\u63d0\u9192\u6211\u4eec&#xff1a;\u521d\u59cb\u5316\u5217\u8868\u662f&#034;\u521d\u59cb\u5316&#034;\u800c\u975e&#034;\u8d4b\u503c&#034;&#xff0c;\u8bed\u6cd5\u4e0a\u7684\u7ec6\u5fae\u5dee\u522b\u53ef\u80fd\u5bfc\u81f4\u8bed\u4e49\u5b8c\u5168\u4e0d\u540c\u3002<\/p>\n<h4>3.4 \u6307\u9488\u76f8\u51cf&#xff1a;\u5143\u7d20\u4e2a\u6570\u800c\u975e\u5b57\u8282\u5dee<\/h4>\n<p>\u9898\u76ee&#xff1a;\u5047\u8bbe\u73af\u5883\u662f x86&#xff08;32 \u4f4d&#xff09;&#xff0c;\u7a0b\u5e8f\u8f93\u51fa\u7684\u7ed3\u679c\u662f\u5565&#xff1f;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>p<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    p <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%p, %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>p<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token operator\">&amp;<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>p<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#8211;<\/span> <span class=\"token operator\">&amp;<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbfa1429.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u662f\u300aC\u548c\u6307\u9488\u300b\u4e2d&#034;\u6307\u9488\u51cf\u6cd5\u5f97\u5230\u7684\u662f\u5143\u7d20\u4e2a\u6570&#034;\u8fd9\u4e00\u89c4\u5219\u7684\u7ecf\u5178\u5e94\u7528\u3002\u4e24\u4e2a\u6307\u9488\u76f8\u51cf\u7684\u7ed3\u679c\u4e0d\u662f\u5730\u5740\u7684\u5b57\u8282\u5dee&#xff0c;\u800c\u662f\u5b83\u4eec\u4e4b\u95f4\u5143\u7d20\u7684\u4e2a\u6570\u3002<\/p>\n<p>\u9996\u5148\u5206\u6790 a \u7684\u7c7b\u578b\u3002a \u662f int[5][5]&#xff0c;\u4f5c\u4e3a\u53f3\u503c\u53c2\u4e0e\u8fd0\u7b97\u65f6\u9000\u5316\u4e3a\u6307\u5411\u7b2c\u4e00\u884c\u7684\u6307\u9488&#xff0c;\u7c7b\u578b\u4e3a int (*)[5]&#xff0c;\u6b65\u957f\u662f\u4e00\u6574\u884c&#xff08;5 \u4e2a int&#xff0c;20 \u5b57\u8282&#xff09;\u3002<\/p>\n<p>p \u88ab\u58f0\u660e\u4e3a int (*)[4]&#xff0c;\u6b65\u957f\u662f\u4e00\u884c 4 \u4e2a int&#xff08;16 \u5b57\u8282&#xff09;\u3002<\/p>\n<p>\u8ba1\u7b97 &amp;p[4][2]&#xff1a;p[4] \u7b49\u4ef7\u4e8e *(p &#043; 4)&#xff0c;p \u8df3\u8fc7 4 \u884c&#xff08;\u6bcf\u884c 4 \u4e2a int&#xff09;&#xff0c;\u5230\u8fbe\u7b2c 5 \u884c\u3002p[4][2] \u518d\u504f\u79fb 2 \u4e2a int\u3002\u76f8\u5bf9\u4e8e\u6570\u7ec4\u9996\u5730\u5740&#xff0c;\u603b\u504f\u79fb\u4e3a 4 * 4 &#043; 2 &#061; 18 \u4e2a int\u3002<\/p>\n<p>\u8ba1\u7b97 &amp;a[4][2]&#xff1a;a[4] \u7b49\u4ef7\u4e8e *(a &#043; 4)&#xff0c;a \u8df3\u8fc7 4 \u884c&#xff08;\u6bcf\u884c 5 \u4e2a int&#xff09;&#xff0c;\u5230\u8fbe\u7b2c 5 \u884c\u3002a[4][2] \u518d\u504f\u79fb 2 \u4e2a int\u3002\u76f8\u5bf9\u4e8e\u6570\u7ec4\u9996\u5730\u5740&#xff0c;\u603b\u504f\u79fb\u4e3a 4 * 5 &#043; 2 &#061; 22 \u4e2a int\u3002<\/p>\n<p>\u4e24\u8005\u76f8\u51cf&#xff1a;18 &#8211; 22 &#061; -4&#xff0c;\u5f97\u5230\u7684\u662f\u5143\u7d20\u4e2a\u6570\u5dee&#xff0c;\u5373 -4\u3002<\/p>\n<p>\u7b2c\u4e00\u4e2a printf \u4f7f\u7528 %p \u6253\u5370\u8fd9\u4e2a\u5dee\u503c\u3002\u5728 32 \u4f4d\u7cfb\u7edf\u4e2d&#xff0c;-4 \u7684\u8865\u7801\u8868\u793a\u4e3a 0xFFFFFFFC\u3002\u7b2c\u4e8c\u4e2a printf \u4f7f\u7528 %d \u6253\u5370\u6709\u7b26\u53f7\u6574\u6570 -4\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;0xFFFFFFFC, -4<\/p>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;\u6307\u9488\u76f8\u51cf\u7684\u524d\u63d0\u662f\u4e24\u4e2a\u6307\u9488\u6307\u5411\u540c\u4e00\u5757\u8fde\u7eed\u5185\u5b58\u3002\u76f8\u51cf\u7684\u7ed3\u679c\u662f\u5143\u7d20\u4e2a\u6570&#xff08;\u5e26\u7b26\u53f7\u6574\u6570&#xff09;&#xff0c;\u800c\u975e\u5b57\u8282\u6570\u3002\u5982\u679c\u5730\u5740\u8ba1\u7b97\u6d89\u53ca\u4e0d\u540c\u7684\u6b65\u957f&#xff08;\u5982\u672c\u9898\u4e2d\u7684 int (*)[4] \u548c int (*)[5]&#xff09;&#xff0c;\u5fc5\u987b\u5206\u522b\u6309\u5404\u81ea\u7684\u6b65\u957f\u8ba1\u7b97\u51fa\u76f8\u5bf9\u4e8e\u540c\u4e00\u4e2a\u57fa\u5730\u5740\u7684\u504f\u79fb\u91cf&#xff0c;\u518d\u76f8\u51cf\u3002<\/p>\n<h4>3.5 \u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6307\u9488\u504f\u79fb<\/h4>\n<p>\u9898\u76ee&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> aa<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">7<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">9<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>ptr1 <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span>aa <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span>ptr2 <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>aa <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d, %d&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span>ptr1 <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">(<\/span>ptr2 <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbfb3aa1.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u8003\u5bdf\u7684\u662f\u4e8c\u7ef4\u6570\u7ec4\u540d\u4e0e\u89e3\u5f15\u7528\u64cd\u4f5c\u7684\u4e0d\u540c\u542b\u4e49\u3002<\/p>\n<p>aa \u4f5c\u4e3a\u4e8c\u7ef4\u6570\u7ec4\u540d&#xff0c;\u5728\u53c2\u4e0e\u8fd0\u7b97\u65f6\u9000\u5316\u4e3a\u6307\u5411\u7b2c\u4e00\u884c\u7684\u884c\u6307\u9488&#xff0c;\u7c7b\u578b\u4e3a int (*)[5]&#xff0c;\u6b65\u957f\u662f\u4e00\u6574\u884c&#xff08;20 \u5b57\u8282&#xff09;\u3002aa &#043; 1 \u8df3\u8fc7\u7b2c\u4e00\u884c&#xff0c;\u6307\u5411\u7b2c\u4e8c\u884c\u7684\u8d77\u59cb\u5730\u5740\u3002\u5f3a\u5236\u8f6c\u6362\u4e3a int * \u540e&#xff0c;ptr1 \u7684\u6b65\u957f\u53d8\u4e3a 4 \u5b57\u8282\u3002ptr1 &#8211; 1 \u4ece\u7b2c\u4e8c\u884c\u8d77\u59cb\u4f4d\u7f6e\u5411\u524d\u79fb\u52a8 1 \u4e2a int&#xff0c;\u6307\u5411\u7b2c\u4e00\u884c\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<p>*aa \u7b49\u4ef7\u4e8e aa[0]&#xff0c;\u662f\u7b2c\u4e00\u884c\u7684\u6570\u7ec4\u540d\u3002\u4f5c\u4e3a\u53f3\u503c\u53c2\u4e0e\u8fd0\u7b97\u65f6\u9000\u5316\u4e3a\u6307\u5411\u7b2c\u4e00\u884c\u9996\u5143\u7d20\u7684\u6307\u9488&#xff0c;\u7c7b\u578b\u4e3a int *&#xff0c;\u6b65\u957f\u4e3a 4 \u5b57\u8282\u3002*aa &#043; 1 \u6307\u5411\u7b2c\u4e00\u884c\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20&#xff08;\u503c\u4e3a 2&#xff09;\u3002\u5f3a\u5236\u8f6c\u6362\u4e3a int * \u540e ptr2 \u4ecd\u6307\u5411\u8be5\u4f4d\u7f6e\u3002ptr2 &#8211; 1 \u5411\u524d\u79fb\u52a8 1 \u4e2a int&#xff0c;\u6307\u5411\u7b2c\u4e00\u884c\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;5, 1<\/p>\n<p>\u6838\u5fc3\u6cd5\u5219&#xff1a;aa \u548c *aa \u7684\u503c\u5728\u6570\u503c\u4e0a\u76f8\u540c&#xff0c;\u90fd\u662f\u6570\u7ec4\u9996\u5730\u5740&#xff0c;\u4f46\u7c7b\u578b\u5b8c\u5168\u4e0d\u540c\u3002aa \u662f int (*)[5]&#xff0c;*aa \u662f int *\u3002aa &#043; 1 \u8df3\u8fc7 20 \u5b57\u8282&#xff0c;*aa &#043; 1 \u8df3\u8fc7 4 \u5b57\u8282\u3002<\/p>\n<h4>3.6 \u6307\u9488\u6570\u7ec4\u4e0e\u4e8c\u7ea7\u6307\u9488<\/h4>\n<p>\u9898\u76ee&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>a<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;work&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;at&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;alibaba&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>pa <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    pa<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>pa<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbfc3cf2.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>a \u662f\u4e00\u4e2a\u6307\u9488\u6570\u7ec4&#xff0c;\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f char * \u7c7b\u578b&#xff0c;\u5206\u522b\u6307\u5411\u4e09\u4e2a\u5b57\u7b26\u4e32\u5e38\u91cf\u3002pa \u662f\u4e00\u4e2a\u4e8c\u7ea7\u6307\u9488&#xff0c;\u88ab\u521d\u59cb\u5316\u4e3a\u6307\u5411\u6570\u7ec4 a \u7684\u9996\u5143\u7d20&#xff08;\u5373 a[0] \u7684\u5730\u5740&#xff09;\u3002<\/p>\n<p>pa&#043;&#043; \u8ba9 pa \u5411\u540e\u79fb\u52a8\u4e00\u4e2a char * \u7684\u5927\u5c0f&#xff0c;\u6307\u5411 a[1]\u3002*pa \u89e3\u5f15\u7528\u5f97\u5230 a[1] \u7684\u503c&#xff0c;\u4e5f\u5c31\u662f\u6307\u5411\u5b57\u7b26\u4e32 &#034;at&#034; \u7684\u6307\u9488\u3002<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c&#xff1a;at<\/p>\n<h4>3.7 \u591a\u7ea7\u6307\u9488\u7684\u5185\u5b58\u8ffd\u8e2a<\/h4>\n<p>\u9898\u76ee&#xff1a;<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>c<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;ENTER&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;NEW&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;POINT&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;FIRST&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>cp<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span>c <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> c <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> c <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> c<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>cpp <span class=\"token operator\">&#061;<\/span> cp<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">&#043;&#043;<\/span>cpp<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">&#8212;<\/span><span class=\"token operator\">*<\/span><span class=\"token operator\">&#043;&#043;<\/span>cpp <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>cpp<span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> cpp<span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261002025807-6abf1dbfd607e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u89e3\u6790&#xff1a;<\/p>\n<p>\u8fd9\u9053\u9898\u662f\u300aC\u4e13\u5bb6\u7f16\u7a0b\u300b\u4e2d\u7684\u7ecf\u5178\u9898\u76ee&#xff0c;\u4e5f\u662f\u591a\u7ea7\u6307\u9488\u6700\u6781\u81f4\u7684\u8003\u9a8c\u3002\u5b83\u7684\u552f\u4e00\u89e3\u6cd5\u662f\u753b\u5185\u5b58\u56fe\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f&#xff0c;&#043;&#043;cpp \u548c &#8212; \u64cd\u4f5c\u4f1a\u4fee\u6539 cpp \u548c cp \u7684\u5b9e\u9645\u5185\u5bb9&#xff0c;\u56e0\u6b64\u6bcf\u4e00\u6b65\u90fd\u5efa\u7acb\u5728\u4e0a\u4e00\u6b65\u4fee\u6539\u540e\u7684\u72b6\u6001\u4e4b\u4e0a\u3002<\/p>\n<p>\u521d\u59cb\u5185\u5b58\u5e03\u5c40&#xff1a;<\/p>\n<table>\n<tr>\u6570\u7ec4\u5185\u5bb9\u6307\u5411<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">c[0]<\/td>\n<td align=\"left\">&#034;ENTER&#034;<\/td>\n<td align=\"left\">\u5b57\u7b26\u4e32 ENTER<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">c[1]<\/td>\n<td align=\"left\">&#034;NEW&#034;<\/td>\n<td align=\"left\">\u5b57\u7b26\u4e32 NEW<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">c[2]<\/td>\n<td align=\"left\">&#034;POINT&#034;<\/td>\n<td align=\"left\">\u5b57\u7b26\u4e32 POINT<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">c[3]<\/td>\n<td align=\"left\">&#034;FIRST&#034;<\/td>\n<td align=\"left\">\u5b57\u7b26\u4e32 FIRST<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tr>\u6570\u7ec4\u5185\u5bb9\u6307\u5411<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">cp[0]<\/td>\n<td align=\"left\">c &#043; 3<\/td>\n<td align=\"left\">c[3]&#xff0c;\u5373 &#034;FIRST&#034;<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">cp[1]<\/td>\n<td align=\"left\">c &#043; 2<\/td>\n<td align=\"left\">c[2]&#xff0c;\u5373 &#034;POINT&#034;<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">cp[2]<\/td>\n<td align=\"left\">c &#043; 1<\/td>\n<td align=\"left\">c[1]&#xff0c;\u5373 &#034;NEW&#034;<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">cp[3]<\/td>\n<td align=\"left\">c<\/td>\n<td align=\"left\">c[0]&#xff0c;\u5373 &#034;ENTER&#034;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>cpp \u521d\u59cb\u6307\u5411 cp[0]\u3002<\/p>\n<ul>\n<li>\u7b2c\u4e00\u884c&#xff1a;**&#043;&#043;cpp<\/li>\n<\/ul>\n<p>&#043;&#043;cpp \u9996\u5148\u81ea\u589e&#xff0c;cpp \u4ece\u6307\u5411 cp[0] \u53d8\u4e3a\u6307\u5411 cp[1]\u3002*cpp \u5f97\u5230 cp[1] \u7684\u503c&#xff0c;\u5373 c &#043; 2\u3002\u518d\u89e3\u5f15\u7528\u4e00\u6b21&#xff0c;*(c &#043; 2) \u5f97\u5230\u5b57\u7b26\u4e32 &#034;POINT&#034;\u3002<\/p>\n<p>\u8f93\u51fa&#xff1a;POINT<\/p>\n<p>\u6b64\u65f6 cpp \u6307\u5411 cp[1]&#xff0c;\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<ul>\n<li>\u7b2c\u4e8c\u884c&#xff1a;*&#8211;*&#043;&#043;cpp &#043; 3<\/li>\n<\/ul>\n<p>&#043;&#043;cpp \u5148\u81ea\u589e&#xff0c;cpp \u4ece\u6307\u5411 cp[1] \u53d8\u4e3a\u6307\u5411 cp[2]\u3002<\/p>\n<p>*&#043;&#043;cpp \u89e3\u5f15\u7528\u5f97\u5230 cp[2] \u7684\u503c&#xff0c;\u5373 c &#043; 1\u3002<\/p>\n<p>&#8211;*&#043;&#043;cpp&#xff1a;\u6ce8\u610f cp[2] \u7684\u503c\u88ab\u4fee\u6539&#xff0c;\u4ece c &#043; 1 \u53d8\u4e3a c\u3002<\/p>\n<p>*&#8211;*&#043;&#043;cpp \u89e3\u5f15\u7528\u5f97\u5230 *(c &#043; 0)&#xff0c;\u5373\u5b57\u7b26\u4e32 &#034;ENTER&#034;\u3002<\/p>\n<p>&#043; 3 \u540e&#xff0c;\u6307\u9488\u4ece &#034;ENTER&#034; \u7684 &#039;E&#039; \u4f4d\u7f6e\u5411\u540e\u79fb\u52a8 3 \u4e2a\u5b57\u7b26&#xff0c;\u6307\u5411 &#034;ER&#034;\u3002<\/p>\n<p>\u8f93\u51fa&#xff1a;ER<\/p>\n<p>\u6b64\u65f6 cpp \u6307\u5411 cp[2]&#xff0c;cp[2] \u7684\u503c\u53d8\u4e3a c\u3002<\/p>\n<ul>\n<li>\u7b2c\u4e09\u884c&#xff1a;*cpp[-2] &#043; 3<\/li>\n<\/ul>\n<p>cpp[-2] \u7b49\u4ef7\u4e8e *(cpp &#8211; 2)\u3002cpp \u5f53\u524d\u6307\u5411 cp[2]&#xff0c;cpp &#8211; 2 \u6307\u5411 cp[0]\u3002*(cpp &#8211; 2) \u5f97\u5230 cp[0] \u7684\u503c&#xff0c;\u5373 c &#043; 3\u3002<\/p>\n<p>*cpp[-2] \u518d\u89e3\u5f15\u7528\u4e00\u6b21&#xff0c;\u5f97\u5230 *(c &#043; 3)&#xff0c;\u5373\u5b57\u7b26\u4e32 &#034;FIRST&#034;\u3002<\/p>\n<p>&#043; 3 \u540e&#xff0c;\u4ece &#034;FIRST&#034; \u7684 &#039;F&#039; \u4f4d\u7f6e\u5411\u540e\u79fb\u52a8 3 \u4e2a\u5b57\u7b26&#xff0c;\u6307\u5411 &#034;ST&#034;\u3002<\/p>\n<p>\u8f93\u51fa&#xff1a;ST<\/p>\n<p>\u6ce8\u610f&#xff1a;cpp[-2] \u4e0d\u4fee\u6539 cpp&#xff0c;cpp \u4ecd\u6307\u5411 cp[2]\u3002<\/p>\n<ul>\n<li>\u7b2c\u56db\u884c&#xff1a;cpp[-1][-1] &#043; 1<\/li>\n<\/ul>\n<p>cpp[-1] \u7b49\u4ef7\u4e8e *(cpp &#8211; 1)\u3002cpp \u5f53\u524d\u6307\u5411 cp[2]&#xff0c;cpp &#8211; 1 \u6307\u5411 cp[1]\u3002<\/p>\n<p>cpp[-1] \u5f97\u5230 cp[1] \u7684\u503c\u3002\u6ce8\u610f cp[1] \u7684\u503c\u6ca1\u6709\u88ab\u4fee\u6539\u8fc7&#xff0c;\u4ecd\u7136\u662f c &#043; 2\u3002<\/p>\n<p>cpp[-1][-1] \u7b49\u4ef7\u4e8e *(*(cpp &#8211; 1) &#8211; 1)\u3002*(cpp &#8211; 1) \u662f c &#043; 2&#xff0c;\u51cf 1 \u5f97\u5230 c &#043; 1\u3002\u89e3\u5f15\u7528\u5f97\u5230 *(c &#043; 1)&#xff0c;\u5373\u5b57\u7b26\u4e32 &#034;NEW&#034;\u3002<\/p>\n<p>&#043; 1 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