{"id":97908,"date":"2026-08-30T18:08:45","date_gmt":"2026-08-30T10:08:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/97908.html"},"modified":"2026-08-30T18:08:45","modified_gmt":"2026-08-30T10:08:45","slug":"c%e8%af%ad%e8%a8%80%ef%bc%9a%e7%bb%93%e6%9e%84%e4%bd%93%e8%bf%9b%e9%98%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/97908.html","title":{"rendered":"C\u8bed\u8a00\uff1a\u7ed3\u6784\u4f53\u8fdb\u9636"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>\n<ul>\n<li>\u672c\u6587\u65e8\u5728\u7cfb\u7edf\u6027\u5730\u4ecb\u7ecdC\u8bed\u8a00\u4e2d\u7ed3\u6784\u4f53\u7684\u8fdb\u9636\u77e5\u8bc6\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u4e00\u3001\u7ed3\u6784\u4f53\u7c7b\u578b\u58f0\u660e<\/li>\n<li>\n<ul>\n<li>1.1\u3001\u5d4c\u5957\u7ed3\u6784\u4f53\u7c7b\u578b<\/li>\n<li>1.2\u3001\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u7528<\/li>\n<li>1.3\u3001typedef\u7b80\u5316\u7ed3\u6784\u4f53\u7c7b\u578b<\/li>\n<li>1.4\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b<\/li>\n<li>\n<ul>\n<li>1.4.1\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b\u552f\u4e00<\/li>\n<li>1.4.2\u3001\u533f\u540d\u7ed3\u6784\u4f53\u4f5c\u4e3a\u6210\u5458<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u7ed3\u6784\u4f53\u6570\u7ec4<\/li>\n<li>\u4e09\u3001\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50<\/li>\n<li>\n<ul>\n<li>3.1\u3001\u5bf9\u9f50\u89c4\u5219<\/li>\n<li>3.2\u3001\u5b58\u5728\u5185\u5b58\u5bf9\u9f50\u539f\u56e0<\/li>\n<li>3.3\u3001\u7ed3\u6784\u4f53\u8bbe\u8ba1\u6280\u5de7<\/li>\n<li>3.4\u3001\u4fee\u6539\u9ed8\u8ba4\u5bf9\u9f50\u6570<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u7ed3\u6784\u4f53\u7684\u4f4d\u6bb5&#xff08;\u4f4d\u57df&#xff09;\u6210\u5458<\/li>\n<li>\n<ul>\n<li>4.1\u3001\u4f4d\u6bb5\u7684\u5185\u5b58\u5206\u914d<\/li>\n<li>4.2\u3001\u4f4d\u6bb5\u7684\u8de8\u5e73\u53f0\u4e0d\u786e\u5b9a\u56e0\u7d20<\/li>\n<li>4.3\u3001\u4f4d\u6bb5\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879<\/li>\n<li>4.4\u3001\u4f4d\u6bb5\u7684\u7279\u6b8a\u5199\u6cd5<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>\u524d\u8a00<\/h2>\n<h3>\u672c\u6587\u65e8\u5728\u7cfb\u7edf\u6027\u5730\u4ecb\u7ecdC\u8bed\u8a00\u4e2d\u7ed3\u6784\u4f53\u7684\u8fdb\u9636\u77e5\u8bc6\u3002<\/h3>\n<h2>\u4e00\u3001\u7ed3\u6784\u4f53\u7c7b\u578b\u58f0\u660e<\/h2>\n<h3>1.1\u3001\u5d4c\u5957\u7ed3\u6784\u4f53\u7c7b\u578b<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ed3\u6784\u4f53\u4e2d\u4f7f\u7528\u53e6\u4e00\u4e2a\u7ed3\u6784\u4f53\u7c7b\u578b\u4f5c\u4e3a\u6210\u5458\u3002 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u5b66\u751f\u6709\u751f\u65e5&#xff0c;\u751f\u65e5\u5305\u542b\u5e74\/\u6708\/\u65e5 \u2192 \u628a&#034;\u751f\u65e5&#034;\u5355\u72ec\u8bbe\u8ba1\u6210\u4e00\u4e2a\u7ed3\u6784\u4f53&#xff0c;\u518d\u653e\u8fdb&#034;\u5b66\u751f&#034;\u7ed3\u6784\u4f53\u91cc\u3002<\/span><br \/>\n<span class=\"token comment\">\/\/ \u7b2c\u4e00\u6b65&#xff1a;\u5b9a\u4e49\u65e5\u671f\u7ed3\u6784\u4f53<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Date<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> year<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> month<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> day<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u7b2c\u4e8c\u6b65&#xff1a;\u5728\u5b66\u751f\u7ed3\u6784\u4f53\u4e2d\u5d4c\u5957\u65e5\u671f\u7ed3\u6784\u4f53<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Date<\/span> birthday<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5d4c\u5957<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> id<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5d4c\u5957\u7ed3\u6784\u4f53\u7684\u521d\u59cb\u5316<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> s <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;aoyun&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">2008<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;2026010102&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6210\u5458\u7684\u8bbf\u95ee<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u2f63\u2f47:%d-%d-%d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>s<span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>year<span class=\"token punctuation\">,<\/span>s<span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>month<span class=\"token punctuation\">,<\/span>s<span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>day<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<h3>1.2\u3001\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u7528<\/h3>\n<p>\u7ed3\u6784\u4f53\u5185\u90e8\u5305\u542b\u4e00\u4e2a\u6307\u5411\u540c\u7c7b\u578b\u7ed3\u6784\u4f53\u7684\u6307\u9488\u3002 \u4ee3\u7801\u793a\u4f8b&#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;stdlib.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u94fe\u8868\u8282\u70b9&#xff08;\u81ea\u5f15\u7528\u7ed3\u6784\u4f53&#xff09;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Node<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> data<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Node<\/span><span class=\"token operator\">*<\/span> next<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u6307\u5411\u4e0b\u4e00\u4e2a\u8282\u70b9<\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u521b\u5efa 3 \u4e2a\u8282\u70b9<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Node<\/span> n1<span class=\"token punctuation\">,<\/span> n2<span class=\"token punctuation\">,<\/span> n3<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5b58\u50a8\u6570\u636e<\/span><br \/>\n    n1<span class=\"token punctuation\">.<\/span>data <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    n2<span class=\"token punctuation\">.<\/span>data <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    n3<span class=\"token punctuation\">.<\/span>data <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8fde\u63a5\u6210\u94fe\u8868<\/span><br \/>\n    n1<span class=\"token punctuation\">.<\/span>next <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>n2<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ n1 \u6307\u5411 n2<\/span><br \/>\n    n2<span class=\"token punctuation\">.<\/span>next <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>n3<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ n2 \u6307\u5411 n3<\/span><br \/>\n    n3<span class=\"token punctuation\">.<\/span>next <span class=\"token operator\">&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ n3 \u662f\u6700\u540e\u4e00\u4e2a\u8282\u70b9<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u904d\u5386\u94fe\u8868\u5e76\u6253\u5370<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Node<\/span><span class=\"token operator\">*<\/span> p <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>n1<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>p <span class=\"token operator\">!&#061;<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <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 operator\">-&gt;<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        p <span class=\"token operator\">&#061;<\/span> p<span class=\"token operator\">-&gt;<\/span>next<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8f93\u51fa&#xff1a;1 2 3<\/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<h3>1.3\u3001typedef\u7b80\u5316\u7ed3\u6784\u4f53\u7c7b\u578b<\/h3>\n<p>\u5199\u6cd51&#xff1a;\u5b9a\u4e49\u7ed3\u6784\u4f53 &#043; typedef \u5206\u5f00\u5199 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u5148\u5b9a\u4e49\u7ed3\u6784\u4f53<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u518d\u7528 typedef \u8d77\u522b\u540d<\/span><br \/>\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> Student<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528<\/span><br \/>\nStudent s1<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u7b49\u4ef7\u4e8e struct Student s1;<\/span><\/p>\n<p>\u5199\u6cd52&#xff1a;\u5b9a\u4e49\u7ed3\u6784\u4f53\u7684\u540c\u65f6\u4f7f\u7528 typedef \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> age<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> Student<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528<\/span><br \/>\nStudent s1<span class=\"token punctuation\">;<\/span><\/p>\n<h3>1.4\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b<\/h3>\n<p>\u533f\u540d\u7ed3\u6784\u4f53\u662f\u6307\u7701\u7565\u4e86\u7ed3\u6784\u4f53\u6807\u7b7e&#xff08;tag&#xff09; \u7684\u7ed3\u6784\u4f53\u7c7b\u578b\u3002\u5b83\u6ca1\u6709\u540d\u5b57&#xff0c;\u56e0\u6b64\u901a\u5e38\u53ea\u80fd\u5728\u5b9a\u4e49\u65f6\u76f4\u63a5\u521b\u5efa\u53d8\u91cf\u3002 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u666e\u901a\u7ed3\u6784\u4f53&#xff08;\u6709\u540d\u5b57&#xff09;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">X<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">X<\/span> x<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u53ef\u4ee5\u591a\u6b21\u4f7f\u7528<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u533f\u540d\u7ed3\u6784\u4f53&#xff08;\u6ca1\u6709\u540d\u5b57&#xff09;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> x<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u53ea\u80fd\u4f7f\u7528\u8fd9\u4e00\u6b21<\/span><\/p>\n<p>\u4f7f\u7528 typedef \u91cd\u547d\u540d\u540e&#xff0c;\u5b83\u5c31\u53d8\u6210\u4e86\u4e00\u4e2a\u53ef\u590d\u7528\u7684\u7c7b\u578b&#xff0c;\u89e3\u51b3\u4e86\u533f\u540d\u7ed3\u6784\u4f53\u7684\u9650\u5236\u3002 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528 typedef \u7ed9\u533f\u540d\u7ed3\u6784\u4f53\u91cd\u547d\u540d<\/span><br \/>\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> X<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ X \u662f\u65b0\u7684\u7c7b\u578b\u540d<\/span><\/p>\n<p>X x1<span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ \u521b\u5efa\u5168\u5c40\u53d8\u91cf x1&#xff08;\u7c7b\u578b X&#xff09;<\/span><br \/>\nX arr<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u521b\u5efa\u6570\u7ec4<\/span><br \/>\nX <span class=\"token operator\">*<\/span>p <span class=\"token operator\">&#061;<\/span> <span class=\"token operator\">&amp;<\/span>x1<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7c7b\u578b\u5339\u914d<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    X x2<span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u521b\u5efa\u5c40\u90e8\u53d8\u91cf x2<\/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<h4>1.4.1\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b\u552f\u4e00<\/h4>\n<p>\u5373\u4f7f\u4e24\u4e2a\u533f\u540d\u7ed3\u6784\u4f53\u7684\u6210\u5458\u5b8c\u5168\u76f8\u540c&#xff0c;\u7f16\u8bd1\u5668\u4e5f\u89c6\u4e3a\u4e0d\u540c\u7c7b\u578b&#xff0c;\u4e0d\u80fd\u76f8\u4e92\u8d4b\u503c\u3002 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> x<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u521b\u5efa\u53d8\u91cf x&#xff0c;\u7c7b\u578b\u662f\u201c\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578bA\u201d<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">float<\/span> c<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 operator\">&amp;<\/span>x<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u9519\u8bef&#xff0c;\u7c7b\u578bA \u2260 \u7c7b\u578bB<\/span><\/p>\n<h4>1.4.2\u3001\u533f\u540d\u7ed3\u6784\u4f53\u4f5c\u4e3a\u6210\u5458<\/h4>\n<p>\u60c5\u51b51&#xff1a;\u533f\u540d\u7ed3\u6784\u4f53\u6210\u5458\u76f4\u63a5\u5c55\u5f00 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token comment\">\/\/ \u533f\u540d\u7ed3\u6784\u4f53&#xff08;\u672a\u521b\u5efa\u53d8\u91cf&#xff09;<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> d<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span> s<span class=\"token punctuation\">;<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3.5f<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u76f4\u63a5\u8bbf\u95ee&#xff0c;\u6210\u5458 c \u548c d \u4f1a\u201c\u4e0a\u6d6e\u201d\u6210\u4e3a\u5916\u5c42\u7ed3\u6784\u4f53\u7684\u6210\u5458\u3002<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>d <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/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>\u60c5\u51b52&#xff1a;\u533f\u540d\u7ed3\u6784\u4f53\u4f5c\u4e3a\u5177\u540d\u6210\u5458 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token comment\">\/\/ \u521b\u5efa\u53d8\u91cf x<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">float<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> d<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> x<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span> s<span class=\"token punctuation\">;<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">.<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3.5f<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u9700\u8981\u901a\u8fc7 x \u8bbf\u95ee<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">.<\/span>d <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100<\/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<h2>\u4e8c\u3001\u7ed3\u6784\u4f53\u6570\u7ec4<\/h2>\n<p>\u7ed3\u6784\u4f53\u6570\u7ec4\u5c31\u662f\u5143\u7d20\u7c7b\u578b\u4e3a\u7ed3\u6784\u4f53\u7684\u6570\u7ec4&#xff0c;\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u7ed3\u6784\u4f53\u6570\u636e\u3002 \u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u65e5\u671f\u7ed3\u6784\u4f53<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Date<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> year<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> month<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> day<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u5b66\u751f\u7ed3\u6784\u4f53&#xff08;\u5305\u542b\u5d4c\u5957\u7ed3\u6784\u4f53&#xff09;<\/span><br \/>\n<span class=\"token keyword\">typedef<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Student<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> name<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Date<\/span> birthday<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5d4c\u5957\u7ed3\u6784\u4f53<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> id<span class=\"token punctuation\">[<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> Student<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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u7ed3\u6784\u4f53\u6570\u7ec4\u521d\u59cb\u5316<\/span><br \/>\n    Student stu_arr<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;zhangsan&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">2008<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;2026010101&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;lisi&#034;<\/span><span class=\"token punctuation\">,<\/span>     <span class=\"token punctuation\">{<\/span><span class=\"token number\">2009<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;2026010102&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;wangwu&#034;<\/span><span class=\"token punctuation\">,<\/span>   <span class=\"token punctuation\">{<\/span><span class=\"token number\">2009<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;2026010103&#034;<\/span><span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u904d\u5386\u8bbf\u95ee\u7ed3\u6784\u4f53\u6570\u7ec4<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;name:%s\\\\tbirth:%d-%d-%d\\\\tid:%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span>stu_arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">,<\/span><br \/>\n        stu_arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>year<span class=\"token punctuation\">,<\/span>stu_arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>month<span class=\"token punctuation\">,<\/span>stu_arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>birthday<span class=\"token punctuation\">.<\/span>day<span class=\"token punctuation\">,<\/span><br \/>\n        stu_arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/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<h2>\u4e09\u3001\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50<\/h2>\n<p>\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f50\u662f\u6307&#xff1a;\u7f16\u8bd1\u5668\u4e3a\u4e86\u63d0\u5347 CPU \u8bbf\u95ee\u5185\u5b58\u7684\u6548\u7387&#xff0c;\u4f1a\u5728\u7ed3\u6784\u4f53\u6210\u5458\u4e4b\u95f4\u63d2\u5165\u201c\u586b\u5145\u5b57\u8282\u201d&#xff08;padding&#xff09;&#xff0c;\u4f7f\u5f97\u6bcf\u4e2a\u6210\u5458\u7684\u8d77\u59cb\u5730\u5740\u90fd\u4f4d\u4e8e\u5176\u201c\u5bf9\u9f50\u8fb9\u754c\u201d\u4e0a\u3002<\/p>\n<p>\u5185\u5b58\u5bf9\u9f50\u662f\u7528\u5c11\u91cf\u5185\u5b58\u586b\u5145\u5b57\u8282&#xff08;\u7a7a\u95f4&#xff09;&#xff0c;\u6362\u53d6 CPU \u4e00\u6b21\u8bfb\u53d6\u5b8c\u6210&#xff08;\u65f6\u95f4&#xff09;\u3002<\/p>\n<h3>3.1\u3001\u5bf9\u9f50\u89c4\u5219<\/h3>\n<p>\u89c4\u52191&#xff1a;\u7ed3\u6784\u4f53\u7684\u7b2c1\u4e2a\u6210\u5458\u5bf9\u9f50\u52300\u504f\u79fb\u5904&#xff08;\u7ed3\u6784\u4f53\u8d77\u59cb\u4f4d\u7f6e&#xff09; \u89c4\u52192&#xff1a;\u4ece\u7b2c2\u4e2a\u6210\u5458\u5f00\u59cb&#xff0c;\u6bcf\u4e2a\u6210\u5458\u5bf9\u9f50\u5230\u5176\u5bf9\u5e94\u7684\u5bf9\u9f50\u6570\u7684\u6574\u6570\u500d\u504f\u79fb\u5904&#xff0c;\u5bf9\u9f50\u6570 &#061; min(\u7f16\u8bd1\u5668\u9ed8\u8ba4\u5bf9\u9f50\u6570, \u6210\u5458\u5927\u5c0f) \u89c4\u52193&#xff1a;\u7ed3\u6784\u4f53\u7684\u603b\u5927\u5c0f\u5fc5\u987b\u662f\u6700\u5927\u5bf9\u9f50\u6570&#xff08;\u5305\u542b\u5d4c\u5957\u7ed3\u6784\u4f53\u7684\u6700\u5927\u5bf9\u9f50\u6570&#xff09;\u7684\u6574\u6570\u500d \u89c4\u52194&#xff1a;\u5d4c\u5957\u7684\u7ed3\u6784\u4f53\u7c7b\u578b\u6210\u5458\u5bf9\u9f50\u5230\u5176\u81ea\u8eab\u6700\u5927\u5bf9\u9f50\u6570\u7684\u6574\u6570\u500d\u504f\u79fb\u5904<\/p>\n<p>VS \u9ed8\u8ba4\u5bf9\u9f50\u6570\u56fa\u5b9a\u4e3a 8&#xff0c;Linux\u73af\u5883\u4e2dGCC \u6ca1\u6709\u9ed8\u8ba4\u5bf9\u9f50\u6570&#xff08;\u5bf9\u9f50\u6570 &#061; \u6210\u5458\u81ea\u8eab\u5927\u5c0f&#xff09;\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#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\">struct<\/span> <span class=\"token class-name\">s1<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">double<\/span> d<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5927\u5c0f 8&#xff0c;\u5bf9\u9f50\u6570 &#061; min(8, 8) &#061; 8<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 0&#xff08;\u7b2c1\u4e2a\u6210\u5458&#xff0c;\u4ece0\u5f00\u59cb&#xff09;<\/span><\/p>\n<p>    <span class=\"token keyword\">char<\/span> c<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u5927\u5c0f 1&#xff0c;\u5bf9\u9f50\u6570 &#061; min(8, 1) &#061; 1<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 8<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u5927\u5c0f 4&#xff0c;\u5bf9\u9f50\u6570 &#061; min(8, 4) &#061; 4<\/span><br \/>\n                <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 12 <\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5f53\u524d\u5df2\u5360&#xff1a;0~15&#xff08;\u5171 16 \u5b57\u8282&#xff09;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6700\u5927\u5bf9\u9f50\u6570 &#061; max(8, 1, 4) &#061; 8<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u603b\u5927\u5c0f\u5fc5\u987b\u662f 8 \u7684\u500d\u6570 \u2192 16 \u5df2\u662f 8 \u7684\u500d\u6570 <\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">s2<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c1<span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/\/ \u5927\u5c0f 1&#xff0c;\u5bf9\u9f50\u6570 &#061; min(8, 1) &#061; 1<\/span><br \/>\n                        <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 0 <\/span><\/p>\n<p>    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">s1<\/span> s1_member<span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u5d4c\u5957\u7ed3\u6784\u4f53&#xff0c;\u5bf9\u9f50\u6570 &#061; \u81ea\u8eab\u6700\u5927\u5bf9\u9f50\u6570 &#061; 8<\/span><br \/>\n                        <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 8 <\/span><br \/>\n                        <span class=\"token comment\">\/\/ s1_member \u5185\u90e8\u5360 16 \u5b57\u8282&#xff08;\u504f\u79fb 8~23&#xff09;<\/span><\/p>\n<p>    <span class=\"token keyword\">double<\/span> d<span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/\/ \u5927\u5c0f 8&#xff0c;\u5bf9\u9f50\u6570 &#061; min(8, 8) &#061; 8<\/span><br \/>\n                        <span class=\"token comment\">\/\/ \u653e\u5728\u504f\u79fb 24&#xff0c;\u5360 8 \u5b57\u8282&#xff08;24~31&#xff09;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5f53\u524d\u5df2\u5360&#xff1a;0~31&#xff08;\u5171 32 \u5b57\u8282&#xff09;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u6700\u5927\u5bf9\u9f50\u6570 &#061; max(1, 8, 8) &#061; 8<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u603b\u5927\u5c0f\u5fc5\u987b\u662f 8 \u7684\u500d\u6570 \u2192 32 \u5df2\u662f 8 \u7684\u500d\u6570 <\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">s1<\/span> s1 <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><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">s2<\/span> s2 <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(struct s1) &#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\">struct<\/span> <span class=\"token class-name\">s1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 16<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sizeof(struct s2) &#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\">struct<\/span> <span class=\"token class-name\">s2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 32<\/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<h3>3.2\u3001\u5b58\u5728\u5185\u5b58\u5bf9\u9f50\u539f\u56e0<\/h3>\n<p>\u5e73\u53f0\u539f\u56e0&#xff08;\u79fb\u690d\u6027&#xff09;&#xff1a;\u67d0\u4e9b CPU \u53ea\u80fd\u4ece\u7279\u5b9a\u5730\u5740\u8bfb\u53d6\u7279\u5b9a\u7c7b\u578b\u7684\u6570\u636e&#xff0c;\u5426\u5219\u4f1a\u629b\u51fa\u786c\u4ef6\u5f02\u5e38 \u6027\u80fd\u539f\u56e0&#xff08;\u6548\u7387&#xff09;&#xff1a;CPU \u4ee5\u603b\u7ebf\u5bbd\u5ea6&#xff08;4\/8 \u5b57\u8282&#xff09;\u4e3a\u7c92\u5ea6\u53d1\u8d77\u5185\u5b58\u8bbf\u95ee&#xff0c;\u5bf9\u9f50\u7684\u6570\u636e\u4e00\u6b21\u8bfb\u5b8c&#xff0c;\u672a\u5bf9\u9f50\u7684\u6570\u636e\u9700\u8981\u591a\u6b21\u8bfb\u53d6&#043;\u62fc\u63a5<\/p>\n<table>\n<tr>\u6982\u5ff5\u5b9a\u4e49\u51b3\u5b9a\u8005\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>CPU\u603b\u7ebf\u5bbd\u5ea6<\/td>\n<td>CPU\u4e0e\u5185\u5b58\u4e4b\u95f4\u4e00\u6b21\u4f20\u8f93\u7684\u6570\u636e\u4f4d\u6570<\/td>\n<td>\u786c\u4ef6<\/td>\n<td>\u51b3\u5b9a CPU \u80fd\u4e00\u6b21\u8bfb\u591a\u5c11\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td>\u9ed8\u8ba4\u5bf9\u9f50\u6570<\/td>\n<td>\u7f16\u8bd1\u5668\u8bbe\u5b9a\u7684\u5bf9\u9f50\u4e0a\u9650<\/td>\n<td>\u7f16\u8bd1\u5668<\/td>\n<td>\u51b3\u5b9a\u7ed3\u6784\u4f53\u6210\u5458\u6700\u5927\u6309\u591a\u5c11\u5b57\u8282\u5bf9\u9f50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9ed8\u8ba4\u5bf9\u9f50\u6570 \u2264 CPU\u603b\u7ebf\u5bbd\u5ea6&#xff0c;\u8fd9\u6837\u624d\u80fd\u4fdd\u8bc1\u5bf9\u9f50\u540e\u7684\u6570\u636e\u4e0d\u4f1a\u8d85\u8fc7 CPU \u4e00\u6b21\u8bfb\u53d6\u7684\u80fd\u529b\u3002<\/p>\n<h3>3.3\u3001\u7ed3\u6784\u4f53\u8bbe\u8ba1\u6280\u5de7<\/h3>\n<p>\u5c06\u5360\u7528\u7a7a\u95f4\u5c0f\u7684\u6210\u5458\u96c6\u4e2d\u653e\u5728\u4e00\u8d77&#xff0c;\u53ef\u4ee5\u6709\u6548\u51cf\u5c11\u586b\u5145\u5b57\u8282&#xff0c;\u8282\u7701\u5185\u5b58\u3002<\/p>\n<p>\u6838\u5fc3\u539f\u7406&#xff1a;char \u7c7b\u578b\u5bf9\u9f50\u6570\u4e3a 1&#xff0c;\u53ef\u4ee5\u653e\u5728\u4efb\u610f\u504f\u79fb\u4f4d\u7f6e&#xff0c;\u4e0d\u4f1a\u4ea7\u751f\u586b\u5145\u3002\u5c06\u591a\u4e2a char \u653e\u5728\u4e00\u8d77&#xff0c;\u5b83\u4eec\u4f1a\u8fde\u7eed\u6392\u5217&#xff0c;\u5171\u7528\u540c\u4e00\u4e2a\u586b\u5145\u201c\u95f4\u9699\u201d\u3002 \u4ee3\u7801\u793a\u4f8b&#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\">struct<\/span> <span class=\"token class-name\">S1<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c1<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u504f\u79fb 0<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u504f\u79fb 4&#xff08;\u5bf9\u9f50\u65704&#xff0c;\u504f\u79fb1~3\u586b\u5145&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c2<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u504f\u79fb 8<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u603b\u5927\u5c0f&#xff1a;12 \u5b57\u8282&#xff08;\u6700\u5927\u5bf9\u9f50\u65704&#xff0c;12\u662f4\u7684\u500d\u6570&#xff0c;9\u219212&#xff09;<\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S2<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c1<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u504f\u79fb 0<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c2<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u504f\u79fb 1&#xff08;\u5bf9\u9f50\u65701&#xff0c;\u7d27\u6328\u7740&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u504f\u79fb 4&#xff08;\u5bf9\u9f50\u65704&#xff0c;\u504f\u79fb2~3\u586b\u5145&#xff09;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u603b\u5927\u5c0f&#xff1a;8 \u5b57\u8282&#xff08;\u6700\u5927\u5bf9\u9f50\u65704&#xff0c;8\u662f4\u7684\u500d\u6570&#xff09;<\/span><\/p>\n<h3>3.4\u3001\u4fee\u6539\u9ed8\u8ba4\u5bf9\u9f50\u6570<\/h3>\n<p>#pragma pack(n) \u53ef\u4ee5\u4e34\u65f6\u4fee\u6539\u9ed8\u8ba4\u5bf9\u9f50\u6570&#xff0c;\u63a7\u5236\u7ed3\u6784\u4f53\u7684\u7d27\u51d1\u7a0b\u5ea6\u3002pack(1) \u6d88\u9664\u586b\u5145\u8282\u7701\u7a7a\u95f4&#xff0c;\u4f46\u53ef\u80fd\u964d\u4f4e\u8bbf\u95ee\u901f\u5ea6&#xff1b;\u7528\u5b8c\u540e\u53ca\u65f6 #pragma pack() \u6062\u590d\u9ed8\u8ba4\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#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 macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">pack<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/\/ \u8bbe\u7f6e\u9ed8\u8ba4\u5bf9\u9f50\u6570\u4e3a 1<\/span><\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c1<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u5bf9\u9f50\u6570 &#061; min(1, 1) &#061; 1<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ \u5bf9\u9f50\u6570 &#061; min(1, 4) &#061; 1<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> c2<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u5bf9\u9f50\u6570 &#061; min(1, 1) &#061; 1<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">pack<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>    <\/span><span class=\"token comment\">\/\/ \u53d6\u6d88\u8bbe\u7f6e&#xff0c;\u6062\u590d\u9ed8\u8ba4\u5bf9\u9f50\u6570<\/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 punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%zu\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 6&#xff08;1&#043;4&#043;1&#xff0c;\u65e0\u586b\u5145&#xff09;<\/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<h2>\u56db\u3001\u7ed3\u6784\u4f53\u7684\u4f4d\u6bb5&#xff08;\u4f4d\u57df&#xff09;\u6210\u5458<\/h2>\n<p>\u5728\u7ed3\u6784\u4f53\u5b9a\u4e49\u4e2d&#xff0c;\u5982\u679c\u6210\u5458\u540d\u540e\u9762\u52a0\u4e0a\u4e00\u4e2a\u5192\u53f7\u548c\u6570\u5b57&#xff0c;\u5c31\u79f0\u4e3a\u4f4d\u6bb5\u6210\u5458\u3002\u8fd9\u4e2a\u6570\u5b57\u8868\u793a\u8be5\u6210\u5458\u5360\u7528\u7684\u6bd4\u7279\u4f4d\u6570&#xff0c;\u800c\u4e0d\u662f\u5b57\u8282\u6570\u3002<\/p>\n<p>C\u8bed\u8a00\u6807\u51c6\u89c4\u5b9a&#xff1a;C89\/C90&#xff1a;\u4f4d\u6bb5\u6210\u5458\u7684\u7c7b\u578b\u5fc5\u987b\u662f int\u3001unsigned int \u6216 signed int\u3002C99&#xff1a;\u65b0\u589e\u652f\u6301 _Bool \u7c7b\u578b\u3002<\/p>\n<p>\u73b0\u4ee3\u7f16\u8bd1\u5668\u7684\u6269\u5c55&#xff0c;\u5927\u591a\u6570\u7f16\u8bd1\u5668&#xff08;GCC\u3001Clang\u3001MSVC&#xff09;\u5728\u5b9e\u9645\u5b9e\u73b0\u4e2d\u653e\u5bbd\u4e86\u7c7b\u578b\u9650\u5236&#xff0c;\u989d\u5916\u652f\u6301&#xff1a;char\u3001unsigned char\u3001short\u3001unsigned short\u3001long\u3001unsigned long\u3001long long\u3001unsigned long long\u3001\u679a\u4e3e\u7c7b\u578b&#xff08;enum&#xff09;\u3002 \u6ce8\u610f&#xff1a;\u8fd9\u4e9b\u6269\u5c55\u652f\u6301\u53d6\u51b3\u4e8e\u5177\u4f53\u7f16\u8bd1\u5668&#xff0c;\u4e0d\u662fC\u6807\u51c6\u5f3a\u5236\u8981\u6c42\u7684\u3002\u5982\u679c\u8ffd\u6c42\u53ef\u79fb\u690d\u6027&#xff0c;\u5efa\u8bae\u53ea\u4f7f\u7528\u6807\u51c6\u89c4\u5b9a\u7684\u7c7b\u578b\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">A<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> a <span class=\"token operator\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5360\u75282\u4f4d<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> b <span class=\"token operator\">:<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5360\u75285\u4f4d<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> c <span class=\"token operator\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5360\u752810\u4f4d<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> d <span class=\"token operator\">:<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5360\u752830\u4f4d<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h3>4.1\u3001\u4f4d\u6bb5\u7684\u5185\u5b58\u5206\u914d<\/h3>\n<p>\u2460\u6210\u5458\u7c7b\u578b&#xff1a;\u4f4d\u6bb5\u6210\u5458\u53ef\u4ee5\u662f int\u3001unsigned int\u3001signed int \u6216 char \u7b49\u7c7b\u578b&#xff08;\u73b0\u4ee3\u7f16\u8bd1\u5668\u901a\u5e38\u652f\u6301\u66f4\u4e30\u5bcc\u7684\u7c7b\u578b&#xff09;\u3002<\/p>\n<p>\u2461\u6309\u7c7b\u578b\u7533\u8bf7\u7a7a\u95f4&#xff1a;\u6210\u5458\u4e3a unsigned int \/ signed int \u65f6&#xff0c;\u6bcf\u6b21\u6309 4 \u5b57\u8282\u7533\u8bf7\u5185\u5b58\u7a7a\u95f4\u3002\u6210\u5458\u4e3a unsigned char \/ signed char \u65f6&#xff0c;\u6bcf\u6b21\u6309 1 \u5b57\u8282\u7533\u8bf7\u5185\u5b58\u7a7a\u95f4\u3002\u6309\u9700\u6269\u5c55&#xff0c;\u5f53\u524d\u5355\u5143\u4e0d\u591f\u7528\u65f6\u7533\u8bf7\u4e0b\u4e00\u4e2a\u5355\u5143\u3002<\/p>\n<p>\u2462\u5b9e\u73b0\u4f9d\u8d56&#xff1a;\u4f4d\u6bb5\u5bf9\u5185\u5b58\u7684\u4f7f\u7528\u7ec6\u8282&#xff08;\u586b\u5145\u3001\u8de8\u5355\u5143\u3001\u987a\u5e8f\u7b49&#xff09;\u9ad8\u5ea6\u4f9d\u8d56\u7f16\u8bd1\u5668\u5b9e\u73b0&#xff0c;C\u6807\u51c6\u672a\u4f5c\u4e25\u683c\u89c4\u5b9a\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/\u5206\u914d\u65b9\u5411&#xff1a;\u4ece\u4f4e\u4f4d\u5230\u9ad8\u4f4d\u5206\u914d<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5269\u4f59\u4f4d\u7b56\u7565&#xff1a;\u5f53\u524d\u5355\u5143\u5269\u4f59\u4f4d\u4e0d\u591f\u65f6&#xff0c;\u820d\u5f03\u586b\u5145&#xff0c;\u7533\u8bf7\u65b0\u5355\u5143<\/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;stdio.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u4f4d\u6bb5\u7ed3\u6784\u4f53<\/span><br \/>\n<span class=\"token comment\">\/\/ \u6210\u5458\u7c7b\u578b\u4e3a unsigned char \u2192 \u6bcf\u6b21\u6309 1 \u5b57\u8282&#xff08;8\u4f4d&#xff09;\u7533\u8bf7\u7a7a\u95f4<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> a <span class=\"token operator\">:<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ a \u5360\u7528 3 \u4f4d&#xff08;bit0~bit2&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> b <span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ b \u5360\u7528 4 \u4f4d&#xff08;bit3~bit6&#xff09;&#xff0c;\u5f53\u524d\u5b57\u8282\u5269\u4f595\u4f4d&#xff0c;\u8db3\u591f\u5b58\u653e<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> c <span class=\"token operator\">:<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ c \u5360\u7528 5 \u4f4d&#xff0c;\u5f53\u524d\u5b57\u8282\u53ea\u52691\u4f4d&#xff08;bit7&#xff09;&#xff0c;\u4e0d\u591f<\/span><br \/>\n                           <span class=\"token comment\">\/\/ \u2192 \u7533\u8bf7\u7b2c2\u4e2a\u5b57\u8282&#xff0c;c \u4ece\u65b0\u5b57\u8282\u7684 bit0 \u5f00\u59cb\u5b58\u653e<\/span><br \/>\n                           <span class=\"token comment\">\/\/ \u2192 \u7b2c1\u5b57\u8282\u5269\u4f59 bit7 \u88ab\u586b\u5145\u5e9f\u5f03<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> d <span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ d \u5360\u7528 4 \u4f4d&#xff0c;\u5f53\u524d\u5b57\u8282&#xff08;\u7b2c2\u5b57\u8282&#xff09;\u5269\u4f593\u4f4d&#xff08;bit3~bit5&#xff09;&#xff0c;\u4e0d\u591f<\/span><br \/>\n                           <span class=\"token comment\">\/\/ \u2192 \u7533\u8bf7\u7b2c3\u4e2a\u5b57\u8282&#xff0c;d \u4ece\u65b0\u5b57\u8282\u7684 bit0 \u5f00\u59cb\u5b58\u653e<\/span><br \/>\n                           <span class=\"token comment\">\/\/ \u2192 \u7b2c2\u5b57\u8282\u5269\u4f59 bit3~bit7 \u88ab\u586b\u5145\u5e9f\u5f03<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u603b\u5927\u5c0f &#061; 3 \u5b57\u8282<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">S<\/span> s <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>      <span class=\"token comment\">\/\/ \u5c06\u6240\u6709\u5b57\u8282\u521d\u59cb\u5316\u4e3a 0<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u8d4b\u503c\u6ce8\u610f&#xff1a;\u503c\u4e0d\u80fd\u8d85\u8fc7\u4f4d\u6bb5\u80fd\u5bb9\u7eb3\u7684\u8303\u56f4<\/span><br \/>\n    <span class=\"token comment\">\/\/ a \u5360 3 \u4f4d&#xff0c;\u6700\u5927\u80fd\u5b58 2^3 &#8211; 1 &#061; 7<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/\/ 10 &#061; \u4e8c\u8fdb\u5236 1010&#xff0c;\u4f46 a \u53ea\u6709 3 \u4f4d \u2192 \u622a\u65ad\u4e3a 010&#xff08;\u5373 2&#xff09;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ b \u5360 4 \u4f4d&#xff0c;\u6700\u5927\u80fd\u5b58 2^4 &#8211; 1 &#061; 15<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">12<\/span><span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/\/ 12 &#061; \u4e8c\u8fdb\u5236 1100&#xff0c;\u5b8c\u6574\u5b58\u5165 b \u7684 4 \u4f4d<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ c \u5360 5 \u4f4d&#xff0c;\u6700\u5927\u80fd\u5b58 2^5 &#8211; 1 &#061; 31<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>c <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/\/ 3 &#061; \u4e8c\u8fdb\u5236 00011&#xff0c;\u5b8c\u6574\u5b58\u5165 c \u7684 5 \u4f4d<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ d \u5360 4 \u4f4d&#xff0c;\u6700\u5927\u80fd\u5b58 2^4 &#8211; 1 &#061; 15<\/span><br \/>\n    s<span class=\"token punctuation\">.<\/span>d <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/\/ 4 &#061; \u4e8c\u8fdb\u5236 0100&#xff0c;\u5b8c\u6574\u5b58\u5165 d \u7684 4 \u4f4d<\/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<h3>4.2\u3001\u4f4d\u6bb5\u7684\u8de8\u5e73\u53f0\u4e0d\u786e\u5b9a\u56e0\u7d20<\/h3>\n<table>\n<tr>\u4e0d\u786e\u5b9a\u56e0\u7d20\u8bf4\u660e\u5f71\u54cd\u5c42\u9762<\/tr>\n<tbody>\n<tr>\n<td>\u7b26\u53f7\u6027<\/td>\n<td>int \u4f4d\u6bb5\u88ab\u5f53\u4f5c\u6709\u7b26\u53f7\u8fd8\u662f\u65e0\u7b26\u53f7&#xff0c;\u7531\u7f16\u8bd1\u5668\u51b3\u5b9a<\/td>\n<td>\u8bed\u4e49&#xff08;\u6570\u636e\u89e3\u91ca&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u6700\u5927\u4f4d\u6570<\/td>\n<td>16\u4f4d\u673a\u5668\u6700\u592716\u4f4d&#xff0c;32\u4f4d\u673a\u5668\u6700\u592732\u4f4d&#xff0c;\u5199\u621027\u572816\u4f4d\u673a\u5668\u4e0a\u4f1a\u51fa\u95ee\u9898<\/td>\n<td>\u8bed\u4e49&#xff08;\u6570\u636e\u8303\u56f4&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5206\u914d\u987a\u5e8f<\/td>\n<td>\u4ece\u9ad8\u4f4d\u8fd8\u662f\u4f4e\u4f4d\u5f00\u59cb\u5206\u914d&#xff0c;\u6807\u51c6\u672a\u5b9a\u4e49<\/td>\n<td>\u5e03\u5c40&#xff08;\u987a\u5e8f&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5269\u4f59\u4f4d\u5904\u7406<\/td>\n<td>\u5f53\u524d\u5355\u5143\u5269\u4f59\u4f4d\u4e0d\u591f\u65f6&#xff0c;\u662f\u586b\u5145\u5e9f\u5f03\u8fd8\u662f\u8de8\u5355\u5143\u5229\u7528&#xff0c;\u6807\u51c6\u672a\u5b9a\u4e49<\/td>\n<td>\u5e03\u5c40&#xff08;\u586b\u5145\/\u8de8\u5355\u5143&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6ce8&#xff1a;\u2460\u586b\u5145&#xff1a;\u5269\u4f59\u4f4d\u88ab\u5e9f\u5f03\u4e0d\u7528&#xff0c;\u79f0\u4e3a\u586b\u5145\u3002\u2461\u8de8\u5355\u5143&#xff1a;\u5269\u4f59\u4f4d\u4e0d\u591f\u65f6&#xff0c;\u7f16\u8bd1\u5668\u53ef\u9009\u62e9\u5c06\u6210\u5458\u653e\u5165\u4e0b\u4e00\u4e2a\u5355\u5143&#xff08;\u820d\u5f03\u5269\u4f59\u4f4d&#xff09;&#xff0c;\u4e5f\u53ef\u9009\u62e9\u8de8\u5355\u5143\u5b58\u50a8&#xff08;\u90e8\u5206\u5728\u5f53\u524d\u5355\u5143&#xff0c;\u90e8\u5206\u5728\u4e0b\u4e00\u4e2a\u5355\u5143&#xff09;\u3002\u2462\u987a\u5e8f&#xff1a;\u5c0f\u7aef\u7cfb\u7edf\u4ece\u4f4e\u4f4d&#xff08;bit0&#xff09;\u5f00\u59cb\u5206\u914d&#xff0c;\u5927\u7aef\u7cfb\u7edf\u4ece\u9ad8\u4f4d&#xff08;bit7&#xff09;\u5f00\u59cb\u5206\u914d\u3002<\/p>\n<p>\u4f4d\u6bb5\u80fd\u8282\u7701\u5185\u5b58&#xff0c;\u4f46\u5b58\u5728\u5927\u91cf\u5b9e\u73b0\u5b9a\u4e49&#xff08;\u7f16\u8bd1\u5668\u5fc5\u987b\u5728\u6587\u6863\u4e2d\u8bf4\u660e&#xff09;\u884c\u4e3a&#xff0c;\u8de8\u5e73\u53f0\u6027\u5dee\u3002\u6ce8\u91cd\u53ef\u79fb\u690d\u6027\u7684\u7a0b\u5e8f\u5e94\u907f\u514d\u4f7f\u7528\u4f4d\u6bb5&#xff0c;\u6216\u9488\u5bf9\u5e73\u53f0\u505a\u4e13\u95e8\u5904\u7406\u3002<\/p>\n<h3>4.3\u3001\u4f4d\u6bb5\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>\u2460sizeof \u8fd4\u56de\u7684\u662f\u5b57\u8282\u6570&#xff0c;\u800c\u4f4d\u6bb5\u6210\u5458\u53ef\u80fd\u53ea\u5360\u51e0\u4e2a bit&#xff0c;\u4e0d\u591f 1 \u4e2a\u5b57\u8282\u3002C \u6807\u51c6\u89c4\u5b9a sizeof \u4e0d\u80fd\u4f5c\u7528\u4e8e\u4f4d\u6bb5\u6210\u5458\u3002<\/p>\n<p>\u2461\u5185\u5b58\u4e2d\u6bcf\u4e2a\u5b57\u8282\u5206\u914d\u4e00\u4e2a\u5730\u5740&#xff0c;\u800c\u5b57\u8282\u5185\u90e8\u7684 bit \u4f4d\u6ca1\u6709\u72ec\u7acb\u5730\u5740\u3002\u4f4d\u6bb5\u6210\u5458\u53ef\u80fd\u4ece\u67d0\u4e2a\u5b57\u8282\u7684\u4e2d\u95f4\u4f4d\u7f6e\u5f00\u59cb&#xff0c;\u6ca1\u6709\u5bf9\u5e94\u7684\u5730\u5740&#xff0c;\u56e0\u6b64\u4e0d\u80fd\u4f7f\u7528 &amp; \u64cd\u4f5c\u7b26\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">A<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> _a <span class=\"token operator\">:<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> _b <span class=\"token operator\">:<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> _c <span class=\"token operator\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> _d <span class=\"token operator\">:<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/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 punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">A<\/span> sa <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><br \/>\n    <span class=\"token comment\">\/\/ printf(&#034;%zu\\\\n&#034;, sizeof(sa._a));  \/\/ \u9519\u8bef,\u4f4d\u6bb5\u6210\u5458\u4e0d\u80fd\u4f5c\u4e3a sizeof \u7684\u64cd\u4f5c\u6570<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ scanf(&#034;%d&#034;, &amp;sa._b);  \/\/ \u9519\u8bef,\u4e0d\u80fd\u5bf9\u4f4d\u6bb5\u6210\u5458\u53d6\u5730\u5740<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/\u6b63\u786e,\u5148\u8bfb\u5165\u666e\u901a\u53d8\u91cf&#xff0c;\u518d\u8d4b\u503c\u7ed9\u4f4d\u6bb5\u6210\u5458<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">scanf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    sa<span class=\"token punctuation\">.<\/span>_b <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/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<h3>4.4\u3001\u4f4d\u6bb5\u7684\u7279\u6b8a\u5199\u6cd5<\/h3>\n<p>\u2460 \u65e0\u540d\u4f4d\u6bb5&#xff08;\u8df3\u8fc7\u6307\u5b9a\u4f4d\u6570&#xff09; \u4f5c\u7528&#xff1a;\u5728\u5f53\u524d\u5b58\u50a8\u5355\u5143\u4e2d\u8df3\u8fc7\u6307\u5b9a\u4f4d\u6570&#xff0c;\u4e0d\u5206\u914d\u7ed9\u4efb\u4f55\u6210\u5458\u3002\u8df3\u8fc7\u7684\u4f4d\u88ab\u586b\u5145\u5e9f\u5f03&#xff0c;\u4e14\u65e0\u6cd5\u88ab\u7a0b\u5e8f\u8bbf\u95ee\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Example<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> a <span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5360\u4f4e4\u4f4d<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> <span class=\"token operator\">:<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u533f\u540d\u4f4d\u6bb5&#xff0c;\u8df3\u8fc74\u4f4d&#xff08;\u4e0d\u547d\u540d&#xff0c;\u65e0\u6cd5\u8bbf\u95ee&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> b <span class=\"token operator\">:<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u4ece\u4e0b\u4e00\u4e2a\u5b57\u8282\u5f00\u59cb<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u2461 \u96f6\u5bbd\u5ea6\u4f4d\u6bb5&#xff08;\u5f3a\u5236\u5bf9\u9f50\u5230\u4e0b\u4e00\u4e2a\u5b58\u50a8\u5355\u5143&#xff09; 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punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u96f6\u5bbd\u5ea6\u4f4d\u6bb5&#xff1a;\u5f3a\u5236\u7ed3\u675f\u5f53\u524d\u5b58\u50a8\u5355\u5143<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> b <span class=\"token operator\">:<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u4ece\u65b0\u5b58\u50a8\u5355\u5143&#xff08;\u4e0b\u4e00\u4e2a\u5b57\u8282&#xff09;\u5f00\u59cb<\/span><br \/>\n    <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">char<\/span> c <span class=\"token operator\">:<\/span> <span class=\"token number\">8<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u518d\u53601\u4e2a\u5b57\u8282<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55\u524d\u8a00\u672c\u6587\u65e8\u5728\u7cfb\u7edf\u6027\u5730\u4ecb\u7ecdC\u8bed\u8a00\u4e2d\u7ed3\u6784\u4f53\u7684\u8fdb\u9636\u77e5\u8bc6\u3002\u4e00\u3001\u7ed3\u6784\u4f53\u7c7b\u578b\u58f0\u660e1.1\u3001\u5d4c\u5957\u7ed3\u6784\u4f53\u7c7b\u578b1.2\u3001\u7ed3\u6784\u4f53\u7684\u81ea\u5f15\u75281.3\u3001typedef\u7b80\u5316\u7ed3\u6784\u4f53\u7c7b\u578b1.4\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b1.4.1\u3001\u533f\u540d\u7ed3\u6784\u4f53\u7c7b\u578b\u552f\u4e001.4.2\u3001\u533f\u540d\u7ed3\u6784\u4f53\u4f5c\u4e3a\u6210\u5458\u4e8c\u3001\u7ed3\u6784\u4f53\u6570\u7ec4\u4e09\u3001\u7ed3\u6784\u4f53\u5185\u5b58\u5bf9\u9f503.1\u3001\u5bf9\u9f50\u89c4\u52193.2\u3001\u5b58\u5728\u5185\u5b58\u5bf9\u9f50\u539f\u56e03.3\u3001\u7ed3\u6784\u4f53\u8bbe\u8ba1\u6280\u5de73.4\u3001\u4fee\u6539\u9ed8\u8ba4\u5bf9\u9f50\u6570\u56db\u3001\u7ed3\u6784\u4f53\u7684\u4f4d\u6bb5&#xff08;\u4f4d\u57df&#xff09;\u6210\u54584.1\u3001\u4f4d\u6bb5\u7684\u5185\u5b58\u5206\u914d4.2\u3001\u4f4d\u6bb5\u7684\u8de8\u5e73\u53f0\u4e0d\u786e\u5b9a\u56e0\u7d204.3\u3001\u4f4d\u6bb5\u4f7f\u7528\u7684<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174],"topic":[],"class_list":["post-97908","post","type-post","status-publish","format-standard","hentry","category-server","tag-c"],"yoast_head":"<!-- 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