{"rsdb":{"rid":"157218","subhead":"","postdate":"0","aid":"117942","fid":"49","uid":"1","topic":"1","content":"
\n \u5173\u952e\u5b57\uff1aC++<\/a>,strcpy,\u5b57\u7b26\u4e32,\u590d\u5236,\u62f7\u8d1d,copy,\u7b14\u8bd5,\u8bd5\u9898\n
\n \u9898\u76ee\uff1a
\u5df2\u77e5strcpy\u51fd\u6570\u7684\u539f\u578b\u662f\uff1a
char * strcpy(char * strDest,const char * strSrc);
1.\u4e0d\u8c03\u7528\u5e93\u51fd\u6570\uff0c\u5b9e\u73b0strcpy\u51fd\u6570\u3002
2.\u89e3\u91ca\u4e3a\u4ec0\u4e48\u8981\u8fd4\u56dechar *\u3002<\/strong>\n
\n
\u89e3\u8bf4\uff1a\n
1.strcpy\u7684\u5b9e\u73b0\u4ee3\u7801\n
char * strcpy(char * strDest,const char * strSrc)\n
{\n
if ((strDest==NULL)||(strSrc==NULL)) \/\/[1]\n
throw "Invalid argument(s)"; \/\/[2]\n
char * strDestCopy=strDest; \/\/[3]\n
while ((*strDest++=*strSrc++)!='\/0'); \/\/[4]\n
return strDestCopy;\n
}\n
\u9519\u8bef\u7684\u505a\u6cd5\uff1a\n
[1]\n
(A)\u4e0d\u68c0\u67e5\u6307\u9488\u7684\u6709\u6548\u6027\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u4e0d\u6ce8\u91cd\u4ee3\u7801\u7684\u5065\u58ee\u6027\u3002\n
(B)\u68c0\u67e5\u6307\u9488\u7684\u6709\u6548\u6027\u65f6\u4f7f\u7528((!strDest)||(!strSrc))\u6216(!(strDest&&strSrc))\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u5bf9C\u8bed\u8a00<\/a>\u4e2d\u7c7b\u578b\u7684\u9690\u5f0f\u8f6c\u6362\u6ca1\u6709\u6df1\u523b\u8ba4\u8bc6\u3002\u5728\u672c\u4f8b\u4e2dchar *\u8f6c\u6362\u4e3abool\u5373\u662f\u7c7b\u578b\u9690\u5f0f\u8f6c\u6362\uff0c\u8fd9\u79cd\u529f\u80fd\u867d\u7136\u7075\u6d3b\uff0c\u4f46\u66f4\u591a\u7684\u662f\u5bfc\u81f4\u51fa\u9519\u6982\u7387\u589e\u5927\u548c\u7ef4\u62a4\u6210\u672c\u5347\u9ad8\u3002\u6240\u4ee5C++<\/a>\u4e13\u95e8\u589e\u52a0\u4e86bool\u3001true\u3001false\u4e09\u4e2a\u5173\u952e\u5b57\u4ee5\u63d0\u4f9b\u66f4\u5b89\u5168\u7684\u6761\u4ef6\u8868\u8fbe\u5f0f\u3002\n
(C)\u68c0\u67e5\u6307\u9488\u7684\u6709\u6548\u6027\u65f6\u4f7f\u7528((strDest==0)||(strSrc==0))\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u4e0d\u77e5\u9053\u4f7f\u7528\u5e38\u91cf\u7684\u597d\u5904\u3002\u76f4\u63a5\u4f7f\u7528\u5b57\u9762\u5e38\u91cf\uff08\u5982\u672c\u4f8b\u4e2d\u76840\uff09\u4f1a\u51cf\u5c11\u7a0b\u5e8f\u7684\u53ef\u7ef4\u62a4\u6027\u30020\u867d\u7136\u7b80\u5355\uff0c\u4f46\u7a0b\u5e8f\u4e2d\u53ef\u80fd\u51fa\u73b0\u5f88\u591a\u5904\u5bf9\u6307\u9488\u7684\u68c0\u67e5\uff0c\u4e07\u4e00\u51fa\u73b0\u7b14\u8bef\uff0c\u7f16\u8bd1\u5668\u4e0d\u80fd\u53d1\u73b0\uff0c\u751f\u6210\u7684\u7a0b\u5e8f\u5185\u542b\u903b\u8f91\u9519\u8bef\uff0c\u5f88\u96be\u6392\u9664\u3002\u800c\u4f7f\u7528NULL\u4ee3\u66ff0\uff0c\u5982\u679c\u51fa\u73b0\u62fc\u5199\u9519\u8bef\uff0c\u7f16\u8bd1\u5668\u5c31\u4f1a\u68c0\u67e5\u51fa\u6765\u3002\n
[2]\n
(A)return new string("Invalid argument(s)");\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u6839\u672c\u4e0d\u77e5\u9053\u8fd4\u56de\u503c\u7684\u7528\u9014\uff0c\u5e76\u4e14\u4ed6\u5bf9\u5185\u5b58\u6cc4\u6f0f\u4e5f\u6ca1\u6709\u8b66\u60d5\u5fc3\u3002\u4ece\u51fd\u6570\u4e2d\u8fd4\u56de\u51fd\u6570\u4f53\u5185\u5206\u914d\u7684\u5185\u5b58\u662f\u5341\u5206\u5371\u9669\u7684\u505a\u6cd5\uff0c\u4ed6\u628a\u91ca\u653e\u5185\u5b58\u7684\u4e49\u52a1\u629b\u7ed9\u4e0d\u77e5\u60c5\u7684\u8c03\u7528\u8005\uff0c\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8c03\u7528\u8005\u4e0d\u4f1a\u91ca\u653e\u5185\u5b58\uff0c\u8fd9\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002\n
(B)return 0;\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u6ca1\u6709\u638c\u63e1\u5f02\u5e38\u673a\u5236\u3002\u8c03\u7528\u8005\u6709\u53ef\u80fd\u5fd8\u8bb0\u68c0\u67e5\u8fd4\u56de\u503c\uff0c\u8c03\u7528\u8005\u8fd8\u53ef\u80fd\u65e0\u6cd5\u68c0\u67e5\u8fd4\u56de\u503c\uff08\u89c1\u540e\u9762\u7684\u94fe\u5f0f\u8868\u8fbe\u5f0f\uff09\u3002\u5984\u60f3\u8ba9\u8fd4\u56de\u503c\u80a9\u8d1f\u8fd4\u56de\u6b63\u786e\u503c\u548c\u5f02\u5e38\u503c\u7684\u53cc\u91cd\u529f\u80fd\uff0c\u5176\u7ed3\u679c\u5f80\u5f80\u662f\u4e24\u79cd\u529f\u80fd\u90fd\u5931\u6548\u3002\u5e94\u8be5\u4ee5\u629b\u51fa\u5f02\u5e38\u6765\u4ee3\u66ff\u8fd4\u56de\u503c\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u8f7b\u8c03\u7528\u8005\u7684\u8d1f\u62c5\u3001\u4f7f\u9519\u8bef\u4e0d\u4f1a\u88ab\u5ffd\u7565\u3001\u589e\u5f3a\u7a0b\u5e8f\u7684\u53ef\u7ef4\u62a4\u6027\u3002\n
[3]\n
(A)\u5fd8\u8bb0\u4fdd\u5b58\u539f\u59cb\u7684strDest\u503c\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u903b\u8f91\u601d\u7ef4\u4e0d\u4e25\u5bc6\u3002\n
[4]\n
(A)\u5faa\u73af\u5199\u6210while (*strDest++=*strSrc++);\uff0c\u540c[1](B)\u3002\n
(B)\u5faa\u73af\u5199\u6210while (*strSrc!='\/0') *strDest++=*strSrc++;\uff0c\u8bf4\u660e\u7b54\u9898\u8005\u5bf9\u8fb9\u754c\u6761\u4ef6\u7684\u68c0\u67e5\u4e0d\u529b\u3002\u5faa\u73af\u4f53\u7ed3\u675f\u540e\uff0cstrDest\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u6ca1\u6709\u6b63\u786e\u5730\u52a0\u4e0a'\/0'\u3002\n
2.\u8fd4\u56destrDest\u7684\u539f\u59cb\u503c\u4f7f\u51fd\u6570\u80fd\u591f\u652f\u6301\u94fe\u5f0f\u8868\u8fbe\u5f0f\uff0c\u589e\u52a0\u4e86\u51fd\u6570\u7684\u201c\u9644\u52a0\u503c\u201d\u3002\u540c\u6837\u529f\u80fd\u7684\u51fd\u6570\uff0c\u5982\u679c\u80fd\u5408\u7406\u5730\u63d0\u9ad8\u7684\u53ef\u7528\u6027\uff0c\u81ea\u7136\u5c31\u66f4\u52a0\u7406\u60f3\u3002 \u94fe\u5f0f\u8868\u8fbe\u5f0f\u7684\u5f62\u5f0f\u5982\uff1a\n
int iLength=strlen(strcpy(strA,strB));\n
\u53c8\u5982\uff1a\n
char * strA=strcpy(new char[10],strB);\n
\u8fd4\u56destrSrc\u7684\u539f\u59cb\u503c\u662f\u9519\u8bef\u7684\u3002\u5176\u4e00\uff0c\u6e90\u5b57\u7b26\u4e32\u80af\u5b9a\u662f\u5df2\u77e5\u7684\uff0c\u8fd4\u56de\u5b83\u6ca1\u6709\u610f\u4e49\u3002\u5176\u4e8c\uff0c\u4e0d\u80fd\u652f\u6301\u5f62\u5982\u7b2c\u4e8c\u4f8b\u7684\u8868\u8fbe\u5f0f\u3002\u5176\u4e09\uff0c\u4e3a\u4e86\u4fdd\u62a4\u6e90\u5b57\u7b26\u4e32\uff0c\u5f62\u53c2\u7528const\u9650\u5b9astrSrc\u6240\u6307\u7684\u5185\u5bb9\uff0c\u628aconst char *\u4f5c\u4e3achar *\u8fd4\u56de\uff0c\u7c7b\u578b\u4e0d\u7b26\uff0c\u7f16\u8bd1\u62a5\u9519\u3002 \n<\/dd>","orderid":"0","title":"\u4e00\u9053C++\u7b14\u8bd5\u9898\u7684\u89e3\u8bfb","smalltitle":"","mid":"0","fname":"c++\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"1000","pages":"1","comments":"0","posttime":"2017-05-27 17:35:32","list":"1495877732","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"\u4e00\u9053<\/A> \u8bd5\u9898<\/A> \u89e3\u8bfb<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"218.17.197.194","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u4e00\u9053C++\u7b14\u8bd5\u9898\u7684\u89e3\u8bfb","lastview":"1714280718","digg_num":"7768","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}