实现memcopy函数

实现memcopy函数：

void * memcpy(void *dest, const void *src, unsigned int count);
{
    if ((src == NULL) || (dest == NULL))
        return NULL;
    
    while (count--)
        *dest++ = *src++;
        
    return dest;
}

https://blog.csdn.net/goodwillyang/article/details/45559925

https://blog.csdn.net/souprock/article/details/78179324