#include<stdio.h>
int isLY(int);
int main()
{
int year,month,day;
printf("请输入年月(数字):");
scanf("%d%d",&year,&month);
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
day = 31;
else if(month==2 && isLY(year))
day=29;
else if(month==2 && !isLY(year))
day=28;
else
day=30;
printf("%d年%d月共有%d天",year,month,day);
}
int isLY(int year)//是闰年返回1 否则返回0
{
if ((year%4==0 && year%100!= 0)|| year%400==0)
return 1;
return 0;
}