题解 | #获得月份天数#

int year(y)
{//判断为是否闰年
	if ((y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0))
		return 1;//表明为闰年
	else
		return 0;//表明为平年
}
int main()
{
	int y = 0, m = 0, day = 0;
	while (scanf("%d %d", &y, &m) != EOF)
	{
		if (m == 2)
		{
			day = year(y) ? 29 : 28;
		}
		else if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12)
		{
			day = 31;
		}
		else if (m == 4 || m == 6 || m == 9 || m == 11)
		{
			day = 30;
		}
		printf("%d\n", day);
	}
	return 0;
}