第二次java作业

 

第二次作业

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1.

package test3;

import java.util.*;

public class abc {

       public static void main(String[] args) {

              // TODO Auto-generated method stub

              System.out.println("请输入年份,我将判断是否为闰年");

              Scanner input=new Scanner(System.in);                 

              int a = input.nextInt();

              if(a%4==0&&a%4!=0) {

                     System.out.println("是润年");

              }else if(a%400==0) {

                     System.out.println("是润年");

              }else {

              System.out.println("不是闰年");

       }

       }

}

 第二次java作业_第2张图片

 

 

2.

package test3;

import java.util.*;

public class abc{

       public static void main(String[] args) {

              System.out.println("输入四位会员卡号,我可以判断你是否为幸运会员");

              Scanner input=new Scanner(System.in);

              int a = input.nextInt();

              if(a/100%10%3==0) {

                     System.out.println("恭喜您,是幸运会员");

              }else System.out.println("很抱歉,您不是我们的幸运会员12");

       }

}

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3.

package test3;

import java.util.*;

public class abc{

public static void main(String[] args) {

       System.out.println("现有已知函数,请输入x的值,我们会输出对应的y值");

              Scanner input = new Scanner(System.in);

              double x=input.nextDouble();

              double y;

              if(x>0) {

                     y=x+3;

                     System.out.println("对应的y值为"+y);

              }else if(x==0) {

                     y=x;

                     System.out.println("对应的y值为"+y);

              }else if(x<0) {

                     y=2*x-1;

                     System.out.println("对应的y值为"+y);

              }

                    

}

}

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4.

package test3;

import java.util.*;

public class abc{

public static void main(String[] args) {

       System.out.println("请输入三个数,判断能否构成三角形");

              Scanner input = new Scanner(System.in);

              double a=input.nextDouble();

              double b=input.nextDouble();

              double c=input.nextDouble();

              if(a+b>c) {

                     if(a+c>b) {

                            if(b+c>a) {

                                   System.out.println("可以构成三角形");

                            }

                     }

                     else {

                            System.out.println("不能构成三角形");

                     }

              }else {

                     System.out.println("不能构成三角形");

              }         

}

}

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