strcpy函数实现

#include <iostream>#include <assert.h>using namespace std;char *strcpy_mf(char *dst,const char *src){assert((dst != NULL)&&(src != NULL));char *temp = dst;while(*src != '\0'){*dst++ = *src++;}*dst = '\0';return temp;}void main(){char *s2 = "copy11";//正常//char *s2;//运行错误//char *s2 = "";//运行正确，输出空串char *s1 = (char *)malloc(strlen(s2)+1);strcpy_mf(s1,s2);cout << s1 <<endl;}