作业(第三周)

package sss;
import java.util.Scanner;
public class zy {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
System.out.println("请输入年份");
Scanner s = new Scanner(System.in);
int year = s.nextInt();
if (year<0)
{
    System.out.println("年份输入错误,请检查");
    return;
}
if ((year % 4 ==0 && year % 100 !=0)||year % 400 ==0)
{
    System.out.println(year + "是闰年");
}
else
{
    System.out.println(year + "不是闰年");
}
    }

}

 

package sss;
import java.util.Scanner;
public class zy {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入四位会员卡号");
        Scanner s = new Scanner(System.in);
        int card = s.nextInt();
        if (card >= 10000 || card < 1000)
        {
            System.out.println("输入的位数不正确");
            return;
        }
        int bai = card / 100 % 10;
        if (bai % 3 == 0)
        {
            System.out.println("是幸运会员");
        }
        else
        {
            System.out.println("不是幸运会员");
        }
    }

}

 

 

package sss;
import java.util.Scanner;
public class zy {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
                  System.out.println("请输入一个数");
                  int a=input.nextInt();
                  int y;
                  if (a>0){
                      y=a+3;
                  }else if (a==0){
                      y=0;            
                  }else{
                     y=(a*a)-1;
                 }
                 System.out.println(y);}
    }

 

 

package sss;
import java.util.Scanner;
public class zy {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入三条边");
        Scanner s = new Scanner(System.in);
        int a = s.nextInt();
        int b = s.nextInt();
        int c = s.nextInt();
        if (a + b > c && a + c > b && b + c > a)
        {
            System.out.println("能构成三角形");
        }
        else
        {
            System.out.println("不能构成三角形");
        }
}

}