【C库函数】strcat实现

#include <iostream>#include <assert.h>using namespace std;char *strcat_bxy(char *dst, const char *src){assert(dst != NULL && src != NULL);char *tmp = dst;while(*dst != NULL){dst++;}while(*dst++ = *src++);return tmp;}void main(){char a[100] = "bxy";char *b = "123";strcat_bxy(a,b);cout << a <<endl;}