题解 | #获得月份天数#

#include<stdio.h>
int main()
{
    int year=0,month=0;
    while(scanf("%d %d",&year,&month)!=EOF)
    {
        if(year%4==0&&year%100!=0||year%400==0)
        {
            switch(month)
            {
                case 4:
                 printf("30\n");
                 break;
                case 6:
                 printf("30\n");
                 break;
                case 9:
                  printf("30\n");
                  break;
                case 11:
                 printf("30\n");
                 break;
                case 2:
                 printf("29\n");
                 break;
                default:
                 printf("31\n");
            }
        }
        else
        {
            switch(month)
            {
                case 4:
                 printf("30\n");
                 break;
                case 6:
                 printf("30\n");
                 break;
                case 9:
                  printf("30\n");
                  break;
                case 11:
                 printf("30\n");
                 break;
                case 2:
                 printf("28\n");
                 break;
                default:
                printf("31\n");
                break;
            }
            
        }
    }
    return 0;
}