strcpy实现

#include <stdio.h>
#include <string.h>

char * my_strcpy(char *strDest, const char *strSrc);
int main()
{
	char d[16] = {0};
	char s[] = "hello, world!";
	char *t = NULL;
	t = my_strcpy(d, s);
	printf("dest string=%s\n", d);
	printf("dest string=%s\n", t);
	return 0;
}

char * my_strcpy(char *strDest, const char *strSrc)
{
	char *strTemp = strDest;
	if(NULL == strDest || NULL == strSrc)
		return NULL;
	if(strDest == strSrc)
		strDest;
	while((*strDest++ = *strSrc++) != '\0');
	return strTemp;
}