第三周作业

package task1;
import java.util.*;
public class q {
    
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个年份");
        int year=input.nextInt();
        if((year%4==0&&year%100!=0)||(year%400==0))
        {
            System.out.println("是闰年！");
        }else
        {
            System.out.println("不是闰年！");
        }            
    }
}

 

package task1;
import java.util.*;
public class q {
    
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("输入您的4位数卡号");
        int number=input.nextInt();
        if(number/100%10%3==0)
        {
            System.out.println("您是幸运会员！");
        }else
        {
            System.out.println("您不是幸运会员！");
        }            
    }
}

 

 

package task1;
import java.util.*;
public class q {
    
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("请输入x的值");
        double x=input.nextDouble();
        if(x>0){
            System.out.println("y的值是:"+(x+3));
        }else if(x==0){
            System.out.println("y的值是:0");
        }else if(x<0){    
            System.out.println("y的值是:"+(2*x-1));
        }            
    }
}

 

package task1;
import java.util.*;
public class q {
    
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("请输入三个数值");
        double a=input.nextDouble();
        double b=input.nextDouble();
        double c=input.nextDouble();
        if(a+b>c&&a+c>b&&b+c>a){
            System.out.println("输入的数值可构成三角形!");
        }else{
            System.out.println("输入的数值不可构成三角形!");
        }            
    }
}