第三次作业

1
impackage october;
port java.util.Scanner;

public class text1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个年份");
        int year=input.nextInt();
        int yera;
        if(year%4==0&&year%100==1||year%400==0){
            System.out.println("是闰年");
        }else {
            System.out.println("不是闰年");
        }
        

    }

 

2

package dou;
import java.util.Scanner;
public class text2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个四位数");
        int sum=input.nextInt();
        if(sum%1000/100==0){
            System.out.println("你是会员号");
        }else  if(sum>10000){
            System.out.println("你的卡号不存在");
        }else{
            System.out.println("你不是会员");
        
            
            
        }
        

    }

}

3
package dou;
import java.util.Scanner;
public class text3 {

    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");
        double x=input.nextDouble();
        int y;
        if(x>0){
            System.out.println("y="+(x+3));
        }else if(x==0){
            System.out .println("y="+0);
        }else if(x<0){
            System.out.printf("y="+(x*2-1));
            
        }


    }

}

package dou;
import java.util.Scanner;
public class text4 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入三个数");
        int a=input.nextInt();
        int b=input.nextInt();
        int c=input.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");
        }

    }

}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

import java.util.Scanner;

public class text2 {

 

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner input=new Scanner(System.in);

System.out.println("请输入一个四位数");

int sum=input.nextInt();

if(sum%1000/100==0){

System.out.println("你是会员号");

}else  if(sum>10000){

System.out.println("你的卡号不存在");

}else{

System.out.println("你不是会员");

 

 

 

}

 

 

}

 

}