Java第三次作业

package aa;

import java.util.Scanner;

public class text {

    public static void main(String[] args) {
        
        System.out.println("请输入年份:");
        Scanner input=new Scanner(System.in);
        int a=input.nextInt();
        if(a%4==0||a%100!=0&&a%400==0){
            System.out.println("闰年");
            }
        else{
            System.out.println("不是闰年");
        }
    }

}

package aa;

import java.util.Scanner;

public class text {

    public static void main(String[] args) {
        int b;
        System.out.println("请输入会员卡号:");
        Scanner input=new Scanner(System.in);
        int a=input.nextInt();
        b=a/100%10;
        if(b%3==0){
            System.out.println("是幸运会员");
            }
        else{
            System.out.println("不是幸运会员");
        }
    }

}

package aa;

import java.util.Scanner;

public class text {

    public static void main(String[] args) {

        System.out.println("请输入x的值:");
        Scanner input=new Scanner(System.in);
        int x=input.nextInt();
        if(x>0){
            System.out.println(x+3);
            }
        else if(x==0){
            System.out.println(0);
        }
        else{
            System.out.println(x*2-1);
        }
    }

}

package aa;

import java.util.Scanner;

public class text {

    public static void main(String[] args) {

        System.out.println("请输入三角形的三条边:");
        Scanner input=new Scanner(System.in);
        int x=input.nextInt();
        int y=input.nextInt();
        int z=input.nextInt();
        if(x+y>z&&x+z>y&&y+z>x){
            System.out.println("可以构成三角形");
            }
        else{
            System.out.println("不能构成三角形");
        }
    }

}