题解 | #获得月份天数#

#include<stdio.h>
int main()
{
    int year = 0;//输入的年分
    int month = 0;//输入的月份
    int x = 0;//该月天数
    while(scanf("%d %d",&year,&month )!= EOF)
    {
            switch(month){
                case 1 : x = 31;
                    break;
                     case 2 : x = 28;
                    break;
                     case 3: x = 31;
                    break;
                     case 4: x = 30;
                    break;  
                     case 5: x = 31;
                    break;
                     case 6: x = 30;
                    break;
                      case 7: x = 31;
                    break;
                     case 8: x = 31;
                    break;
                      case 9: x = 30;
                    break;
                     case 10: x = 31;
                    break;
                     case 11: x = 30;
                    break;
                     case 12: x = 31;
                    break; 
            }
            if((year%4==0 && year%100!=0)||year%400==0)//判断该年份是不是闰年。若是，则二月为29天，若不是，则二月为28天
            if(month == 2)
                x = 29;
        printf("%d\n",x);
    };
    return 0;
}