第三周作业

public class dic {

    public static void main(String[] args) {

 Scanner input=new Scanner(System.in);
 System.out.println("请输入一个年份");
 int m=input.nextInt();
 if (m%4==0 && m%100!=0 ||m%400==0) {
     System.out.println(m+"这个年份是闰年");
 }
 else {
     System.out.println(m+"这个年份不是闰年");
 
 }
 
    }
}

 

 

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package set;   import java.util.Scanner;   public class delop {       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 n= input.nextInt();     int b=n%1000/100;     if(n>999||n<10000) {         if(b%3==0) {             System.out.println("是会员");           } else { System.out.println("不是会员");           }}}}

　　

 

 

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package set;   import java.util.Scanner;   public class dese {       public static void main(String[] args) {         // TODO Auto-generated method stub         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  if (x<0) {          System.out.println(x*x-1);         }                    }          }

　　

 

 

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package set;   import java.util.Scanner;   public class dese {       public static void main(String[] args) {               Scanner input=new Scanner(System.in);         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("能组成三角形");         } else {             System.out.println("不能形成三角形");                       }                }       }