c14

输入某一年的月份，输出该月的天数

#include<stdio.h>
void main()
{
	int year, month, day;
	printf("输入年份月份\n");
	scanf("%d,%d", &year, &month);
	switch (month)
	{
	case 1:
	case 3:
	case 5:
	case 7:
	case 8:
	case 10:
	case 12:day = 31;
		break;
	case 4:
	case 6:
	case 9:
	case 11:day = 30;
		break;
	case 2:
	{
		if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
			day = 29;
		else
			day = 28;
	}
	break;
	}
	printf("该月%d天\n", day);
}