第三周JAVA作业 计算机1804 张垚

1.

package hh;

 

import java.util.Scanner;

 

public class KK {

 

    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");

        }

    }

}

 2.

package hh;

 

import java.util.Scanner;

 

public class KK {

 

    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");

        }

    }

 

 3.

package hh;

 

import java.util.Scanner;

 

public class KK {

 

    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);

        }

    }

 }

 4.

package hh;

 

import java.util.Scanner;

 

public class KK {

 

    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");

        }

    }

}