题解 | #获得月份天数#

#include <stdio.h>

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