Java第四次作业

package Class1;

import java.util.Random;
import java.util.Scanner;

public class Class1 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入您的卡号");
        int num=input.nextInt();
        int c;
        c=num/100%10;
        Random r=new Random();
        int a=r.nextInt(10);
        System.out.println("今天的幸运数字是"+a);
        if(c==a){
            System.out.println("恭喜您成为幸运会员");
        }
        else{
            System.out.println("谢谢惠顾");
        }

    }

}

package Class1;


import java.util.Scanner;

public class Class2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入年份");
        int num=input.nextInt();
        if (num%4==0&&num%100!=0||num%400==0) {
            System.out.println(num+"是闰年");
            
        } else {
            System.out.println(num+"不是闰年");

        }
        
    }

}

package Class1;


import java.util.Scanner;

public class Class3 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=input.nextInt();
        int y;
        if (x>0) {
            y=x+3;
            System.out.println("y的值为"+y);
        } else if(x==0){
            y=0;
            System.out.println("y的值为"+y);
        }else if(x<0){
                y=2*x-1;
            }        
    }

}

package Class1;


import java.util.Scanner;

public class Class4 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入三角形的三条边");
        System.out.println("请输入a");
        int a=input.nextInt();
        System.out.println("请输入b");
        int b=input.nextInt();
        System.out.println("请输入c");
        int c=input.nextInt();
        if (a+c>b&&b+a>c&&b+c>a) {
            System.out.println("能构成三角形");
        } else{
            System.out.println("不能构成三角形");
            }        
    }

}

package Home4;

import java.util.Scanner;

public class Home4 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("请输入年份");
        int year = input.nextInt();
        System.out.println("请输入月份");
        int month = input.nextInt();
        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8
                || month == 10 || month == 12) {
            month = 31;
        } else if (month == 4 || month == 6 | month == 9 || month == 11) {
            month = 30;
        } else if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0
                && month == 2) {
            System.out.println("该年为闰年");
            month = 29;
        } else {
            month = 28;
        }
        System.out.println("该月份的天数为" + month);
    }

}

package Class1;

import java.util.Scanner;

public class Class6 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入成绩");
        int a=input.nextInt();
        switch (a/10) {
        case 6:
            System.out.println("您的成绩等级为D");
            break;
        case 7:
            System.out.println("您的成绩等级为C");
            break;
        case 8:
            System.out.println("您的成绩等级为B");
            break;
        case 9:
        case 10:
            System.out.println("您的成绩等级为A");
            break;
        default:
            System.out.println("您的成绩等级为E");
            break;}
        }

    }

package Class1;

import java.util.Scanner;

public class Class7 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个数字");
        int a=input.nextInt();
        if(a%2==0){
            System.out.println("该数为偶数");
        }else{
            System.out.println("该数为奇数");
        }

    }

}

package Class1;

import java.util.Scanner;

public class Class8 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个数值X");
        int x=input.nextInt();
        if(x==1){
            System.out.println("x=1");
        }else if(x==5){
            System.out.println("x=5");
        }else if(x==10){
            System.out.println("x=10");
        }else{
            System.out.println("x=none");
        }

    }

}

package Class1;

import java.util.Scanner;

public class Class9 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个数值X");
        int x=input.nextInt();
        if(x%5==0&&x%6==0){
            System.out.println("能被5和6整除");
        }else if(x%5==0){
            System.out.println("只能被5整除");
        }else if(x%6==0){
            System.out.println("只能被6整除");
        }else if(x%5!=0||x%6==0){
            System.out.println("不能被5或6整除");
        }
        
    }

}

package Class1;

 

import java.util.Random;

import java.util.Scanner;

 

publicclass Class1 {

 

   /**

    * @param args

    */

   publicstaticvoid main(String[] args) {

      // TODO Auto-generated method stub

      Scanner input=new Scanner(System.in);

      System.out.println("请输入您的卡号");

      int num=input.nextInt();

      int c;

      c=num/100%10;

      Random r=new Random();

      int a=r.nextInt(10);

      System.out.println("今天的幸运数字是"+a);

      if(c==a){

          System.out.println("恭喜您成为幸运会员");

      }

      else{

          System.out.println("谢谢惠顾");

      }

 

   }

 

}