题解 | 获得月份天数

#include <stdio.h>
int main()
{
   int year=0,month=0;
   int total=0;
   while(scanf("%d %d",&year,&month)!=EOF)
   {
    switch(month)
    {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8:
        case 10:
        case 12:
        {
            total=31;
            printf("%d\n",total);
            continue;
        }
        case 2:
        {
            if(year%4==0||(year%4==0&&year%100!=0))
            {
              total=29;
            }
            else
            {
                total=28;
            }
            printf("%d\n",total);
            continue;
        }
        case 4:
        case 6:
        case 9:
        case 11:
        {
            total=30;
            printf("%d\n",total);
            continue;
        }
        default:
        {
            printf("SB");
        }
    }
   }
   return 0;
}