import java.util.Scanner;
public class Test2 {
public static void main(String[] args) {
// 编写程序实现，输入年份和月份，输出该月的天数。
//（提示：能被4整除且不被100整除，或者能被400整除的年份就是闰年。）
Scanner scan = new Scanner(System.in);
System.out.print("请输入年份：");
int year = scan.nextInt();
System.out.print("请输入月份：");
int month = scan.nextInt();
switch(month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
System.out.print(year+"年"+month+"月有31天");
break;
case 4:
case 6:
case 9:
case 11:
System.out.print(year+"年"+month+"月有30天");
break;
case 2:
if(（year % 4 == 0&& year % 100 !=0 ）
year % 400 == 0)
System.out.print(year+"年"+month+"月有29天");
else
System.out.print(year+"年"+month+"月有28天");
break;
default:
System.out.println("您的输入有误！");
break;
}
}
}
}