C++判断数组的值都是0

int a[17] = {0};

bool allZero()
{
	int total = 0;
	for (int i = 0; i < 17; i++)
	{
		if (a[i] == 0)
		{
			total++;
		}
	}

	if (total == 17)
	{
		return true;
	}
	return false;
}