题解 | #获得月份天数#

#include <stdio.h>

int main()
{
	int year = 0;
	int month = 0;
	while(scanf("%d %d", &year, &month)!=EOF)
	{
		switch (month)
		{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:printf("%d\n", 31); break;
		case 4:
		case 6:
		case 9:
		case 11:printf("%d\n", 30); break;
		case 2:
			if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
			{
				printf("%d\n", 29);
				break;
			}
			else
				printf("%d\n", 28);

		}
	}
	

	return 0;
}