{"id":40941,"date":"2025-05-30T12:26:51","date_gmt":"2025-05-30T04:26:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40941.html"},"modified":"2025-05-30T12:26:51","modified_gmt":"2025-05-30T04:26:51","slug":"%e7%a0%b4%e8%a7%a3c-c%e5%86%85%e5%ad%98%e5%88%86%e9%85%8d%e4%b8%8e%e7%ae%a1%e7%90%86%ef%bc%9a%e5%86%85%e5%ad%98%e5%af%b9%e8%b1%a1%e6%a8%a1%e5%9e%8b%e7%a1%ac%e6%a0%b8%e5%89%96%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40941.html","title":{"rendered":"\u7834\u89e3C\/C++\u5185\u5b58\u5206\u914d\u4e0e\u7ba1\u7406\uff1a\u5185\u5b58\u5bf9\u8c61\u6a21\u578b\u786c\u6838\u5256\u6790"},"content":{"rendered":"

\"\"<\/p>\n

\"\"\u00a0<\/p>\n

\u00a0<\/p>\n

\u524d\u5f15：<\/span>C++\u7684\u5185\u5b58\u7ba1\u7406\u662f\u7f16\u7a0b\u4e2d\u7684\u4e00\u628a\u300c\u53cc\u5203\u5251\u300d\u2014\u2014\u5b83\u8d4b\u4e88\u5f00\u53d1\u8005\u6781\u81f4\u7684\u6027\u80fd\u63a7\u5236\u6743，\u5374\u4e5f\u6697\u85cf\u5185\u5b58\u6cc4\u6f0f\u3001\u60ac\u5782\u6307\u9488\u3001\u788e\u7247\u5316\u7b49\u81f4\u547d\u9677\u9631\u3002\u65e0\u8bba\u662f\u521d\u5b66\u8005\u7684 new\/delete \u8bef\u7528，\u8fd8\u662f\u8d44\u6df1\u5de5\u7a0b\u5e08\u7684\u667a\u80fd\u6307\u9488\u5faa\u73af\u5f15\u7528\u95ee\u9898，\u5185\u5b58\u76f8\u5173\u7684\u7f3a\u9677\u5f80\u5f80\u6210\u4e3a\u4ee3\u7801\u8d28\u91cf\u7684\u91cd\u4e2d\u4e4b\u91cd！\u672c\u6587\u4ece\u5e95\u5c42\u539f\u7406\u51fa\u53d1，\u76f4\u51fb\u5185\u5b58\u5206\u914d\u7684\u8fd0\u884c\u673a\u5236（\u5982\u5806\u6808\u4ea4\u4e92\u3001\u6570\u636e\u5206\u914d\u7b56\u7565），\u7ed3\u5408\u73b0\u4ee3C++\u7279\u6027，\u5256\u6790\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u7684\u6027\u80fd\u4f18\u5316\u7b56\u7565~\u6b63\u6587\u5f00\u59cb！<\/span><\/p>\n

\u76ee\u5f55<\/p>\n

C\\\\C++\u5185\u5b58\u5206\u5e03<\/p>\n

\u5185\u5b58\u5206\u5e03\u6d4b\u8bd5\u00a0<\/p>\n

C\u8bed\u8a00\u5185\u5b58\u7ba1\u7406<\/p>\n

C++\u5185\u5b58\u7ba1\u7406<\/p>\n

\u4f7f\u7528<\/p>\n

\u4f18\u52bf<\/p>\n

malloc\u5bf9\u4e8e\u81ea\u5b9a\u4e49\u7c7b\u578b<\/p>\n

new\u5bf9\u4e8e\u81ea\u5b9a\u4e49\u7c7b\u578b<\/p>\n

operator new\u4e0eoperator delete\u51fd\u6570<\/p>\n

\u4ecb\u7ecd<\/p>\n

operator new\u7684\u5e95\u5c42\u5b9e\u73b0<\/p>\n

operator delete\u7684\u5e95\u5c42\u5b9e\u73b0<\/p>\n

\u603b\u7ed3<\/p>\n

new\u4e0edelete\u7684\u5b9e\u73b0\u539f\u7406<\/p>\n

\u5185\u7f6e\u7c7b\u578b<\/p>\n

\u81ea\u5b9a\u4e49\u7c7b\u578b<\/p>\n

new\u7684\u539f\u7406<\/p>\n

delete\u7684\u539f\u7406<\/p>\n

\u4e3e\u4f8b<\/p>\n

new[ ]\u7684\u539f\u7406<\/p>\n

delete[ ]\u7684\u539f\u7406<\/p>\n

\u5e38\u89c1\u9762\u8bd5\u9898\u603b\u7ed3<\/p>\n

malloc\/free\u4e0enew\/delete\u533a\u522b<\/p>\n

\u5171\u540c\u7279\u70b9<\/p>\n

\u76f4\u63a5\u7279\u70b9<\/p>\n

\u5e95\u5c42\u7279\u70b9<\/p>\n

\u5185\u5b58\u6cc4\u6f0f<\/p>\n

\u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f<\/p>\n

\u5185\u5b58\u6cc4\u6f0f\u5371\u5bb3<\/p>\n

\u5185\u5b58\u6cc4\u6f0f\u5206\u7c7b<\/p>\n

\u5982\u4f55\u68c0\u67e5\/\u907f\u514d\u5185\u5b58\u6cc4\u6f0f<\/p>\n

\n

C\\\\C++\u5185\u5b58\u5206\u5e03<\/h3>\n

\u4e0b\u9762\u662fC\/C++\u4e2d\u7a0b\u5e8f\u5185\u5b58\u533a\u57df\u5212\u5206\u56fe<\/span>，\u5c0f\u7f16\u5bf9\u5b83\u4eec\u7684\u5206\u914d\u8fdb\u884c\u89e3\u8bfb：<\/p>\n

\"\"<\/p>\n

\u5185\u6838\u7a7a\u95f4：<\/span>\u7528\u6237\u4ee3\u7801\u4e0d\u80fd\u8bfb\u5199，\u4e00\u822c\u7528\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u4f7f\u7528<\/p>\n

\u6808：<\/span>\u5411\u4e0b\u589e\u957f，\u7528\u4e8e\u5b58\u50a8\u5c40\u90e8\u53d8\u91cf\u548c\u51fd\u6570\u8c03\u7528\u4fe1\u606f（\u9002\u5408\u4e34\u65f6\u6570\u636e）<\/p>\n

\u5185\u5b58\u6620\u5c04\u6bb5：<\/span>\u6587\u4ef6\u6620\u5c04\u3001\u52a8\u6001\u5e93\u3001\u533f\u540d\u6620\u5c04（\u540e\u9762\u518d\u5b66，\u5f53\u524d\u4e0d\u6613\u638c\u63e1）<\/p>\n

\u5806：<\/span>\u5411\u4e0a\u589e\u957f，\u7528\u4e8e\u52a8\u6001\u5185\u5b58\u5206\u914d（\u63d0\u4f9b\u7075\u6d3b\u7684\u5185\u5b58\u5927\u5c0f，\u4f46\u7a7a\u95f4\u6709\u9650）<\/p>\n

\u6570\u636e\u6bb5：<\/span>\u5b58\u50a8\u5168\u5c40\u53d8\u91cf\u548c\u9759\u6001\u6570\u636e（\u6570\u636e\u9700\u8981\u957f\u671f\u5b58\u5728）<\/p>\n

\u4ee3\u7801\u6bb5：<\/span>\u5b58\u653e\u53ef\u6267\u884c\u4ee3\u7801\u548c\u53ea\u8bfb\u5e38\u91cf（\u4fdd\u62a4\u4ee3\u7801\u548c\u5e38\u91cf\u4e0d\u88ab\u4fee\u6539）<\/p>\n

\u6570\u636e\u5206\u914d\u89e3\u8bfb：<\/span><\/p>\n

（1）\u56fe\u4e2d\u7684\u5168\u5c40\u53d8\u91cf\u3001\u9759\u6001\u6570\u636e\u9700\u8981\u957f\u671f\u5b58\u5728，\u7a0b\u5e8f\u542f\u52a8\u65f6\u5206\u914d，\u7a0b\u5e8f\u7ed3\u675f\u65f6\u91ca\u653e<\/p>\n

（2） localVar\u3001num1[10]\u3001char2[ ]\u3001pChar3\u3001ptr1\u3001ptr2\u3001ptr3\u8fd9\u4e9b\u53d8\u91cf\u5728\u51fd\u6570\u8c03\u7528\u65f6\u5206\u914d，\u51fd \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u6570\u7ed3\u675f\u65f6\u81ea\u52a8\u91ca\u653e，\u968f\u7740\u51fd\u6570\u5f00\u8f9f，\u56e0\u6b64\u5b58\u50a8\u5728\u6808\u533a<\/p>\n

（3）pChar3\u6307\u9488\u6307\u5411\u7684\u201cabcd\u201d\u5c5e\u4e8e\u5b57\u7b26\u4e32\u3001char2\u7684\u5b57\u7b26\u6570\u7ec4，\u5c5e\u4e8e\u53ea\u8bfb\u7c7b，\u56e0\u6b64\u5b58\u50a8\u5728\u4ee3\u7801\u6bb5<\/p>\n

（4）malloc\u3001realloc\u3001calloc\u5f00\u8f9f\u7684\u5185\u5b58\u7a7a\u95f4\u4e0d\u53d7\u51fd\u6570\u63a7\u5236，\u9700\u8981\u624b\u52a8\u91ca\u653e，\u56fa\u5728\u5806\u533a<\/p>\n

\u95ee：\u4e3a\u4ec0\u4e48\u6307\u9488\u3001\u4ee5\u53ca\u5bf9\u5e94\u540e\u9762\u7684\u6570\u636e\u9700\u8981\u5206\u5f00\u5b58\u50a8？<\/span>（\u96f7\u533a：\u8bef\u4ee5\u4e3a\u6574\u884c\u8bed\u53e5\u5728\u540c\u4e00\u4e2a\u7a7a\u95f4）<\/p>\n

（1）\u9996\u5148\u6307\u9488\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u53d8\u91cf（\u6307\u9488\u53d8\u91cf），\u5b58\u50a8\u6307\u5411\u540e\u9762\u6570\u636e\u7684\u5730\u5740，\u5b83\u7684\u751f\u547d\u5468\u671f\u9075\u5faa\u5c40 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u90e8\u53d8\u91cf\u89c4\u5219，\u56fa\u5b58\u50a8\u5728\u6808\u533a<\/p>\n

（2）\u540c\u7406 num1\u3010\u3011\u662f\u4e00\u4e2a\u5c40\u90e8\u6570\u7ec4\u53d8\u91cf，\u5b83\u7684\u751f\u547d\u5468\u671f\u4e5f\u662f\u968f\u5f53\u524d\u51fd\u6570\u5f00\u8f9f\u91ca\u653e<\/p>\n

（3）\u800c\u5b57\u7b26\u6307\u9488\u6307\u5411\u7684\u5b57\u7b26\u4e32\u6570\u636e\u5185\u5bb9\u5c5e\u4e8e\u53ea\u8bfb\u9700\u8981，\u56fa\u5b58\u50a8\u5728\u4ee3\u7801\u6bb5\u66f4\u597d<\/p>\n

\u603b\u7ed3：<\/span>\u901a\u8fc7\u9ad8\u6548\u7684\u5185\u5b58\u5206\u914d\u65b9\u5f0f，\u4e0d\u65ad\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027<\/p>\n

\u5185\u5b58\u5206\u5e03\u6d4b\u8bd5\u00a0<\/h3>\n

(1)static int staticGlobalVar = 1;<\/p>\n

int main()
\n{
\n(2)int globalVar = 1;
\n (3)static int staticVar = 1;
\n(4)int localVar = 1;
\n(5)int num1[10] = { 1, 2, 3, 4 };
\n(6)char char2[] = "abcd";
\n(7)const char* pChar3 = "abcd";
\n(8)int* ptr1 = (int*)malloc(sizeof(int) * 4);
\n(9)int* ptr2 = (int*)calloc(4, sizeof(int));
\n(10)int* ptr3 = (int*)realloc(ptr2, sizeof(int) * 4);
\n(11)free(ptr1);
\n(12)free(ptr3);<\/p>\n

return 0;
\n} <\/p>\n

A：\u6808 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 B：\u5806 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 C：\u6570\u636e\u6bb5（\u9759\u6001\u533a） \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0D：\u4ee3\u7801\u6bb5（\u5e38\u91cf\u533a）<\/span><\/p>\n

globalVar\u5728\u54ea\u2014\u2014A \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 staticGlobalVar\u5728\u54ea\u2014\u2014C<\/p>\n

staticVar\u5728\u54ea\u2014\u2014C \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 localVar\u5728\u54ea\u2014\u2014A<\/p>\n

num1 \u5728\u54ea\u2014\u2014A \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0char2\u5728\u54ea\u2014\u2014A<\/p>\n

*char2\u5728\u54ea\u2014\u2014D \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0pChar3\u5728\u54ea\u2014\u2014A<\/p>\n

*pChar3\u5728\u54ea\u2014\u2014D \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 ptr1\u5728\u54ea\u2014\u2014A<\/p>\n

*ptr1\u5728\u54ea\u2014\u2014B<\/p>\n

C\u8bed\u8a00\u5185\u5b58\u7ba1\u7406<\/h3>\n

\u9996\u5148C\u8bed\u8a00\u662f\u901a\u8fc7\u56db\u4e2a\u51fd\u6570\u6765\u5b9e\u73b0\u52a8\u6001\u5185\u5b58\u7ba1\u7406\u7684，\u5b83\u4eec\u7684\u4f5c\u7528\u5982\u4e0b：<\/p>\n

malloc：<\/span>\u5206\u914d\u6307\u5b9a\u5b57\u8282\u6570\u672a\u521d\u59cb\u5316\u5185\u5b58\u5757<\/p>\n

int* ptr1 = (int*)malloc(sizeof(int) * 4); <\/p>\n

realloc：<\/span>\u8c03\u6574\u539f\u6765\u5f00\u8f9f\u7684\u7a7a\u95f4，\u53c2\u6570\u4e3a\u539f\u5730\u5740\u8d77\u59cb\u5730\u3001\u7406\u60f3\u603b\u7a7a\u95f4\u5927\u5c0f<\/p>\n

int* ptr3 = (int*)realloc(ptr2, sizeof(int) * 4); <\/p>\n

calloc：<\/span>\u5206\u914d\u6307\u5b9a\u6570\u91cf\u548c\u5927\u5c0f\u7684\u5185\u5b58\u5757，\u5e76\u521d\u59cb\u5316\u4e3a0<\/p>\n

int* ptr2 = (int*)calloc(4, sizeof(int)); <\/p>\n

\u00a0free：<\/span>\u91ca\u653emalloc\u3001calloc\u3001realloc\u5f00\u8f9f\u7684\u5185\u5b58\u7a7a\u95f4，\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f，\u53c2\u6570\u662f\u91ca\u653e\u524d\u7a7a\u95f4\u8d77\u59cb\u5730\u5740<\/p>\n

free(ptr1); <\/p>\n

C++\u5185\u5b58\u7ba1\u7406<\/h3>\n

\u9996\u5148C++\u517c\u5bb9C\u8bed\u8a00，C\u8bed\u8a00\u5185\u5b58\u7ba1\u7406\u65b9\u5f0f\u5728C++\u4e2d\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528，\u4f46\u6709\u4e9b\u5730\u65b9\u5c31\u65e0\u80fd\u4e3a\u529b，\u800c\u4e14\u4f7f\u7528\u8d77\u6765\u6bd4\u8f83\u9ebb\u70e6\u3002\u56e0\u6b64C++\u53c8\u63d0\u51fa\u4e86\u81ea\u5df1\u7684\u5185\u5b58\u7ba1\u7406\u65b9\u5f0f：<\/p>\n

\u901a\u8fc7new<\/span>\u548cdelete<\/span>\u64cd\u4f5c\u7b26\u8fdb\u884c\u52a8\u6001\u5185\u5b58\u7ba1\u7406（\u8bb0\u4f4f\u662f\u64cd\u4f5c\u7b26，\u4e0d\u662f\u51fd\u6570\u54e6！）<\/p>\n

\u4f7f\u7528<\/h5>\n

\"\"<\/p>\n

C++\u5185\u5b58\u5f00\u8f9f\u5bf9\u6bd4C\u8bed\u8a00\u66f4\u52a0\u7b80\u6d01\u4e86，\u4e0d\u7528\u53bb\u7e41\u7410\u7684\u5224\u65ad，\u4f8b\u5982：<\/p>\n

\/\/\u7533\u8bf7\u4e00\u4e2aint\u7c7b\u578b\u5927\u5c0f\u7684\u7a7a\u95f4
\nint* ptr4 = new int;<\/p>\n

\/\/\u7533\u8bf7\u4e00\u4e2aint\u7c7b\u578b\u5927\u5c0f\u7684\u7a7a\u95f4\u5e76\u521d\u59cb\u5316\u4e3a10
\nint* ptr5 = new int(10);<\/p>\n

\/\/\u7533\u8bf7\u5341\u4e2aint\u7c7b\u578b\u5927\u5c0f\u7684\u7a7a\u95f4
\nint* ptr6 = new int[10];<\/p>\n

\/\/\u91ca\u653e
\ndelete ptr4;
\ndelete ptr5;
\ndelete[] ptr6; <\/p>\n

\"\"<\/p>\n

\u5916\u56f4\u7528try<\/span>\u6355\u83b7\u5f02\u5e38：<\/p>\n

try
\n{
\n Stack* pc = new Stack；<\/p>\n

}
\ncatch (const exception& e)
\n{
\n \/\/\u6355\u83b7\u4fe1\u606f\u53cd\u9988（\u53ef\u4ee5\u662f\u6253\u5370）
\n} <\/p>\n

\u6ce8\u610f：<\/span>\u5f00\u8f9f\u91ca\u653e\u9700\u8981\u914d\u5957（\u5f00\u8f9f+\u6355\u83b7）\u4f7f\u7528，\u5982\u679c\u4e0d\u52a0\u6355\u83b7，\u7a0b\u5e8f\u4f1a\u76f4\u63a5\u5d29\u6e83，\u5426\u5219\u5bb9\u6613\u51fa\u95ee\u9898<\/p>\n

\u4f8b\u5982：\u5355\u4e2a\u7a7a\u95f4\u7533\u8bf7\u7528\u5355\u4e2a\u7684\u5f62\u5f0f\u91ca\u653e；\u5982\u679c\u662fnew\u3010\u3011\u7c7b\u578b\u7684\u7533\u8bf7，\u9700\u8981\u7528delete\u3010\u3011\u91ca\u653e<\/p>\n

\u4f18\u52bf<\/h5>\n

malloc\u4e0efree\u00a0 \u00a0\u8f83\u4e8e\u00a0 \u00a0new\u4e0edelete \u7684\u6700\u5927\u533a\u522b\u662f\u81ea\u5b9a\u4e49\u7c7b\u578b<\/span>\u7684\u7533\u8bf7\u5f00\u8f9f（\u5185\u7f6e\u7c7b\u578b\u51e0\u4e4e\u4e00\u81f4）<\/span><\/p>\n

\u00a0<\/p>\n

malloc\u5bf9\u4e8e\u81ea\u5b9a\u4e49\u7c7b\u578b<\/h6>\n

\u7b80\u5355\u7533\u8bf7\u4e00\u4e2a\u4e00\u5b9a\u5927\u5c0f\u7684\u7a7a\u95f4\u5c31\u53ef\u4ee5\u4e86，\u5bf9\u4e8e\u7a7a\u95f4\u9700\u8981\u5224\u65ad\u6709\u6548\u6027，\u5176\u5b83\u597d\u50cf\u4e5f\u6ca1\u54c8……<\/p>\n<\/p>\n

new\u5bf9\u4e8e\u81ea\u5b9a\u4e49\u7c7b\u578b<\/h6>\n

new\u5bf9\u4e8e\u81ea\u5b9a\u4e49\u7c7b\u578b\u53ef\u4ee5\u8c03\u7528\u6784\u9020\u51fd\u6570<\/span>，delete\u91ca\u653e\u5185\u5b58\u53ef\u4ee5\u8c03\u7528\u6790\u6784\u51fd\u6570<\/span><\/p>\n

\u4f8b\u5982：<\/p>\n

\"\"<\/p>\n

\u6548\u679c\u5c55\u793a：<\/p>\n

\"\"\u00a0<\/p>\n

operator new\u4e0eoperator delete\u51fd\u6570<\/h3>\n

\u4ecb\u7ecd<\/h5>\n

new \u00a0<\/span>\u548c \u00a0delete<\/span>\u662f\u7528\u6237\u8fdb\u884c\u52a8\u6001\u5185\u5b58\u7533\u8bf7\u548c\u91ca\u653e\u7684\u64cd\u4f5c\u7b26，operator new<\/span> \u548c operator delete<\/span>\u662f\u7cfb\u7edf\u63d0\u4f9b\u7684 \u5168\u5c40\u51fd\u6570<\/span>，new\u5728\u5e95\u5c42\u8c03\u7528operator new\u5168\u5c40\u51fd\u6570\u6765\u7533\u8bf7\u7a7a\u95f4，delete\u5728\u5e95\u5c42\u901a\u8fc7operator delete\u5168\u5c40 \u51fd\u6570\u6765\u91ca\u653e\u7a7a\u95f4，\u4e0b\u9762\u7684\u5e95\u5c42\u5b9e\u73b0\u4e86\u89e3\u5373\u53ef，\u8fd9\u5bf9\u4e8e\u6211\u4eec\u638c\u63e1\u5185\u5b58\u5f00\u8f9f\u662f\u5f88\u6709\u7528\u7684！<\/p>\n

operator new\u7684\u5e95\u5c42\u5b9e\u73b0<\/h5>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\u00a0operator new<\/span>\u00a0\u7684\u5e95\u5c42\u662f\u00a0malloc\u00a0<\/span>\u5b9e\u73b0\u7684，\u00a0\u5b83\u8f83\u4e8e\u00a0malloc<\/span>\u00a0\u5f88\u5927\u7684\u4e0d\u540c\u662f：<\/p>\n

\u5982\u679c\u5f00\u8f9f\u7a7a\u95f4\u5931\u8d25，\u90a3\u4e48\u5c31\u4f1a\u629b\u51fa\u5f02\u5e38<\/span>，\u800c\u00a0malloc<\/span>\u00a0\u5219\u4f1a\u8fd4\u56de\u7a7a\u5730\u5740<\/span><\/p>\n

operator delete\u7684\u5e95\u5c42\u5b9e\u73b0<\/h5>\n

\"\"\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\u5c3d\u7ba1\u518d\u600e\u4e48\u53bb\u4fee\u9970，\u5b83\u7684\u5e95\u5c42\u8fd8\u662ffree\u51fd\u6570~\u00a0\u00a0<\/p>\n

\u603b\u7ed3<\/h5>\n

\u901a\u8fc7\u4e0a\u8ff0\u4e24\u4e2a\u5168\u5c40\u51fd\u6570\u7684\u5b9e\u73b0\u6211\u4eec\u53ef\u4ee5\u770b\u5230：<\/p>\n

operator new<\/span>\u5b9e\u9645\u4e0a\u4e5f\u662f\u901a\u8fc7malloc<\/span>\u51fd\u6570\u6765\u5b9e\u73b0，\u53ea\u662f\u4e8c\u8005\u5728\u7a7a\u95f4\u201c\u62a5\u9519\u201d\u4e0a\u6709\u4e86\u660e\u663e\u533a\u522b<\/p>\n

operator delete<\/span>\u5b9e\u9645\u4e0a\u4e5f\u662f\u901a\u8fc7free<\/span>\u51fd\u6570\u6765\u5b9e\u73b0<\/p>\n

new\u4e0edelete\u7684\u5b9e\u73b0\u539f\u7406<\/h3>\n

\u5185\u7f6e\u7c7b\u578b<\/h5>\n

\u5bf9\u4e8e int\u3001char\u3001double\u3001long……..\u8fd9\u4e9b\u5185\u7f6e\u7c7b\u578b<\/p>\n

\u5982\u679c\u7533\u8bf7\u7684\u5185\u7f6e\u7c7b\u578b\u7684\u7a7a\u95f4，new\u4e0emalloc\u57fa\u672c\u7c7b\u4f3c，\u4e8c\u8005\u4e0d\u540c\u5730\u65b9\u5728\u4e8e：<\/p>\n

new\u4e0edelete\u7533\u8bf7\/\u91ca\u653e\u7684\u662f\u5355\u4e2a\u5143\u7d20\u7684\u7a7a\u95f4，new[ ]\u4e0edelete[ ]\u7533\u8bf7\u7684\u662f\u8fde\u7eed\u5730\u5740\u7684\u7a7a\u95f4<\/span><\/p>\n

\u800cnew\u7533\u8bf7\u5931\u8d25\u4f1a\u629b\u51fa\u5f02\u5e38，malloc\u5f00\u8f9f\u5931\u8d25\u4f1a\u8fd4\u56de\u7a7a（\u65e0\u6548\u5730\u5740）<\/span><\/p>\n

\u81ea\u5b9a\u4e49\u7c7b\u578b<\/h5>\n
new\u7684\u539f\u7406<\/h6>\n

（1）\u5148\u8c03\u7528operator new\u51fd\u6570\u7533\u8bf7\u7a7a\u95f4<\/p>\n

（2）\u5728\u7533\u8bf7\u7684\u7a7a\u95f4\u4e0a\u6267\u884c\u6784\u9020\u51fd\u6570，\u5b8c\u6210\u5bf9\u8c61\u7684\u521b\u5efa<\/p>\n

\"\"<\/p>\n

delete\u7684\u539f\u7406<\/h6>\n

（1）\u8c03\u7528\u6790\u6784\u51fd\u6570，\u5b8c\u6210\u5bf9\u8c61\u4e2d\u8d44\u6e90\u7684\u6e05\u7406\u5de5\u4f5c<\/p>\n

（2）\u8c03\u7528operator delete\u51fd\u6570，\u5b8c\u6210\u5bf9\u7a7a\u95f4\u7684\u91ca\u653e<\/p>\n

\"\"<\/p>\n

\u4e3e\u4f8b<\/h6>\n

\u7533\u8bf7\u4e00\u4e2a\u5728\u5806\u4e0a\u7684\u6808\u5bf9\u8c61<\/span><\/p>\n

\u8fd9\u91cc\u7684\u9700\u6c42\u5b8c\u7f8e\u4e0e\u6211\u4eec\u7684new\u5f00\u8f9f\u5339\u914d<\/p>\n

（1）\u5148\u8c03\u7528operator new\u51fd\u6570\u5728\u5806\u4e0a\u5f00\u8f9f\u5185\u5b58<\/p>\n

（2）\u518d\u8c03\u7528\u6784\u9020\u51fd\u6570\u5728\u6808\u4e0a\u5f00\u8f9f\u5bf9\u8c61<\/p>\n

Stack* pc = new Stack； <\/p>\n

\"\"<\/p>\n

new[ ]\u7684\u539f\u7406<\/h6>\n

\u5bf9\u4e8e\u6709\u591a\u4e2a\u6570\u636e\u7684\u7533\u8bf7：<\/p>\n

（1）\u8c03\u7528N\u6b21operator new\u51fd\u6570\u5b8c\u6210\u7a7a\u95f4\u5f00\u8f9f<\/p>\n

（2）\u518d\u8c03\u7528N\u6b21\u6784\u9020\u51fd\u6570\u6267\u884c\u6784\u9020<\/p>\n

delete[ ]\u7684\u539f\u7406<\/h6>\n

（1）\u8c03\u7528N\u6b21\u6790\u6784\u51fd\u6570\u5b8c\u6210\u8d44\u6e90\u7684\u6e05\u7406<\/p>\n

（2）\u8c03\u7528N\u6b21operator delete\u51fd\u6570\u5b8c\u6210\u7a7a\u95f4\u91ca\u653e<\/p>\n

\u5e38\u89c1\u9762\u8bd5\u9898\u603b\u7ed3<\/h3>\n

malloc\/free\u4e0enew\/delete\u533a\u522b<\/h5>\n
\u5171\u540c\u7279\u70b9<\/h6>\n

\u90fd\u9700\u8981\u624b\u52a8\u5f00\u8f9f\u3001\u624b\u52a8\u91ca\u653e<\/p>\n

\u76f4\u63a5\u7279\u70b9<\/h6>\n

（1）malloc\u548cfree\u662f\u51fd\u6570，new\u548cdelete\u662f\u64cd\u4f5c\u7b26（\u5173\u952e\u5b57）<\/p>\n

（2）malloc\u5f00\u8f9f\u9700\u8981\u6307\u5b9a\u7a7a\u95f4\u5927\u5c0f，new\u5f00\u8f9f\u53ea\u9700\u8981\u7c7b\u578b（\u591a\u4e2a\u7a7a\u95f4\u9700\u8981\u6307\u5b9a\u4e2a\u6570）<\/p>\n

（3）malloc\u5f00\u8f9f\u4e0d\u80fd\u521d\u59cb\u5316，new\u5f00\u8f9f\u53ef\u4ee5<\/p>\n

（4）malloc\u5f00\u8f9f\u7a7a\u95f4\u9700\u8981\u5f3a\u8f6c\u7c7b\u578b，new\u5f00\u8f9f\u53ea\u9700\u8981\u6307\u660e\u7c7b\u578b\u5373\u53ef<\/p>\n

（5）malloc\u7533\u8bf7\u5931\u8d25\u8fd4\u56de\u7684\u662fNULL，new\u5f00\u8f9f\u5931\u8d25\u4f1a\u6355\u83b7\u5f02\u5e38<\/p>\n

\u5e95\u5c42\u7279\u70b9<\/h6>\n

malloc\u5f00\u8f9f\u53ea\u662f\u7b80\u5355\u7684\u7533\u8bf7\u5bf9\u5e94\u5927\u5c0f\u7684\u7a7a\u95f4，free\u4e5f\u662f\u76f4\u63a5\u91ca\u653e\u7a7a\u95f4<\/p>\n

new\u5f00\u8f9f\u4f1a\u8c03\u7528operator new\u3001\u6784\u9020\u51fd\u6570（\u5148\u5f00\u8f9f\u7a7a\u95f4，\u518d\u8fdb\u884c\u6784\u9020）<\/p>\n

delete\u91ca\u653e\u4f1a\u8c03\u7528operator delete\u3001\u6790\u6784\u51fd\u6570（\u5148\u6e05\u7406\u8d44\u6e90，\u518d\u91ca\u653e\u7a7a\u95f4）<\/p>\n

\u5185\u5b58\u6cc4\u6f0f<\/h5>\n
\u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f<\/span><\/h6>\n

\u5185\u5b58\u6cc4\u6f0f\u6307\u56e0\u4e3a\u758f\u5ffd\u6216\u9519\u8bef\u9020\u6210\u7a0b\u5e8f\u672a\u80fd\u91ca\u653e\u5df2\u7ecf\u4e0d\u518d\u4f7f\u7528\u7684\u5185\u5b58\u7684\u60c5\u51b5\u3002<\/p>\n

\u5185\u5b58\u6cc4\u6f0f\u5e76\u4e0d\u662f\u6307\u5185\u5b58\u5728\u7269\u7406\u4e0a\u7684\u6d88\u5931，\u800c\u662f\u5e94\u7528\u7a0b\u5e8f\u5206\u914d\u67d0\u6bb5\u5185\u5b58\u540e，\u56e0\u4e3a\u8bbe\u8ba1\u9519\u8bef，\u5931\u53bb\u4e86\u5bf9\u8be5\u6bb5\u5185\u5b58\u7684\u63a7\u5236，\u56e0\u800c\u9020\u6210\u4e86\u5185\u5b58\u7684\u6d6a\u8d39<\/p>\n

\u5185\u5b58\u6cc4\u6f0f\u5371\u5bb3<\/span><\/h6>\n

\u957f\u671f\u8fd0\u884c\u7684\u7a0b\u5e8f\u51fa\u73b0\u5185\u5b58\u6cc4\u6f0f，\u5f71\u54cd\u5f88\u5927，\u5982\u64cd\u4f5c\u7cfb\u7edf\u3001\u540e\u53f0\u670d\u52a1\u7b49\u7b49，\u51fa\u73b0\u5185\u5b58\u6cc4\u6f0f\u4f1a\u5bfc\u81f4\u54cd\u5e94\u8d8a\u6765\u8d8a\u6162，\u6700\u7ec8\u5361\u6b7b<\/p>\n

\u5185\u5b58\u6cc4\u6f0f\u5206\u7c7b<\/h6>\n

\u5806\u5185\u5b58\u6cc4\u6f0f：<\/span><\/p>\n

\u5806\u5185\u5b58\u6307\u7684\u662f\u7a0b\u5e8f\u6267\u884c\u4e2d\u4f9d\u636e\u987b\u8981\u5206\u914d\u901a\u8fc7malloc \/ calloc \/ realloc \/ new\u7b49\u4ece\u5806\u4e2d\u5206\u914d\u7684\u4e00\u5757\u5185\u5b58， \u7528\u5b8c\u540e\u5fc5\u987b\u901a\u8fc7\u8c03\u7528\u76f8\u5e94\u7684 free\u6216\u8005delete \u5220\u6389\u3002\u5047\u8bbe\u7a0b\u5e8f\u7684\u8bbe\u8ba1\u9519\u8bef\u5bfc\u81f4\u8fd9\u90e8\u5206\u5185\u5b58\u6ca1\u6709\u88ab\u91ca\u653e，\u90a3 \u4e48\u4ee5\u540e\u8fd9\u90e8\u5206\u7a7a\u95f4\u5c06\u65e0\u6cd5\u518d\u88ab\u4f7f\u7528，\u5c31\u4f1a\u4ea7\u751fHeap Leak<\/p>\n

\u7cfb\u7edf\u8d44\u6e90\u6cc4\u6f0f：<\/span><\/p>\n

\u6307\u7a0b\u5e8f\u4f7f\u7528\u7cfb\u7edf\u5206\u914d\u7684\u8d44\u6e90，\u6bd4\u65b9\u5957\u63a5\u5b57\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u3001\u7ba1\u9053\u7b49\u6ca1\u6709\u4f7f\u7528\u5bf9\u5e94\u7684\u51fd\u6570\u91ca\u653e\u6389，\u5bfc\u81f4\u7cfb\u7edf \u8d44\u6e90\u7684\u6d6a\u8d39，\u4e25\u91cd\u53ef\u5bfc\u81f4\u7cfb\u7edf\u6548\u80fd\u51cf\u5c11，\u7cfb\u7edf\u6267\u884c\u4e0d\u7a33\u5b9a<\/p>\n

\u5982\u4f55\u68c0\u67e5\/\u907f\u514d\u5185\u5b58\u6cc4\u6f0f<\/h6>\n

（1）\u9996\u5148\u662f\u68c0\u67e5\u5185\u5b58\u6cc4\u6f0f，\u8fd9\u91cc\u5148\u53ea\u4e86\u89e3，\u540e\u9762\u4f1a\u8fdb\u884c\u5b66\u4e60<\/p>\n

（2）\u826f\u597d\u7684\u64cd\u4f5c\u4e60\u60ef\u3001\u667a\u80fd\u6307\u9488（\u540e\u9762\u5b66\u4e60）\u3001\u67d0\u4e9b\u516c\u53f8\u4f1a\u81ea\u5e26\u5185\u5b58\u6cc4\u6f0f\u68c0\u6d4b\u529f\u80fd\u3001\u5185\u5b58\u6cc4\u6f0f\u68c0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u6d4b\u5de5\u5177（\u6602\u8d35）<\/p>\n<\/p>\n

\"\"<\/p>\n

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