strcpy函数

char *strcpy2(char *dst, const char *src)//此处要加const
{
    assert((src != NULL) && (dst != NULL));//加断言判断
    char *address = dst;//方便链式连接
    while ((*dst++ = *src++) != '\0')//注意结尾的'\0'字符
    {
        ;
    }
    return address;
}