模拟实现memcmp

该函数实现内存的比较

void* memcmp(const void* buf1, const void* buf2, size_t count)
{
	assert(buf1 != NULL && buf2 != NULL);
	const char* pbuf1 = (const char*)buf1;
	const char* pbuf2 = (const char*)buf2;
	int re=0;
	while (count-- > 0)
	{
		if ((re = *pbuf1 - *pbuf2) != 0)
			break;
		pbuf1++;
		pbuf2++;
	}

	return re;
}
int main()
{
	int a[] = { 1,2,3,4,5 };
	int b[] = { 1,2,4,3,5,6 };
	int re=memcmp(b, a, sizeof(int) * 5);
	printf("%d", re);
}*/