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char * strcpy(char * strDest,const char * strSrc);
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char * strcpy(char * strDest,const char * strSrc)
{
if ((strDest==NULL)||(strSrc==NULL)) //[1]
throw "Invalid argument(s)"; //[2]
char * strDestCopy=strDest; //[3]
while ((*strDest++=*strSrc++)!='\0'); //[4]
return strDestCopy;
}
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[2]
(A)return new string("Invalid argument(s)");£¬ËµÃ÷´ðÌâÕ߸ù±¾²»ÖªµÀ·µ»ØÖµµÄÓÃ;£¬²¢ÇÒËû¶ÔÄÚ´æÐ¹Â©Ò²Ã»Óо¯ÌèÐÄ¡£´Óº¯ÊýÖзµ»Øº¯ÊýÌåÄÚ·ÖÅäµÄÄÚ´æÊÇÊ®·ÖΣÏÕµÄ×ö·¨£¬Ëû°ÑÊÍ·ÅÄÚ´æµÄÒåÎñÅ׸ø²»ÖªÇéµÄµ÷ÓÃÕߣ¬¾ø´ó¶àÊýÇé¿öÏ£¬µ÷ÓÃÕß²»»áÊÍ·ÅÄڴ棬Õâµ¼ÖÂÄÚ´æÐ¹Â©¡£
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