第二次上机练习

1..编写程序, 输入变量x的值,如果是1,输出x=1,如果是5,输出x=5,如果是 10,输出 x=10,除了以上几个值,都输出x=none。(知识点:if条件语句)
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package test3;
import java.util.Scanner;
 
public class shangji2 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入x的值");
        Scanner input=new Scanner(System.in);
        int x=input.nextInt();
        if (x == 1 || x == 5 || x == 10) {
               System.out.println("x=" + x);
              else {
               System.out.println("x=none");
              }
             }
    }

  2.用switch结构实现第1题

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package test3;
import java.util.Scanner;
 
public class shangji2 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入x的值");
        Scanner input=new Scanner(System.in);
        int x=input.nextInt();
        switch(x){
        case 1:
        case 5:
        case 10:System.out.println("x="+x);break;
        default:System.out.println("x=none");
        }
        }
    }

  

       3.判断一个数字是否能被5和6同时整除(打印能被5和6整除),或只能被5整除(打印能被5整 除),或只能被6整除,(打印能被6整除),不能被5或6整除,(打印不能被5或6整除)

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package test3;
import java.util.Scanner;
 
public class shangji2 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入一个数字");
        Scanner input=new Scanner(System.in);
        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("能被5整除");
              }else if(x%6==0){
                  System.out.println("能被6整除");
                   
              }else if(x%5!=0||x%6!=0){
                  System.out.println("不能被5和6整除");
              }
             }
    }

  4.输入一个0~100的分数,如果不是0~100之间,打印分数无效,根据分数等级打印 A(90-100),B(80-89),C,D,E(知识点:条件语句if elseif)

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package test3;
import java.util.Scanner;
 
public class shangji2 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入一个0-100的数字");
        Scanner input=new Scanner(System.in);
        int x=input.nextInt();
        if(x>100){
            System.out.println("分数无效");
        }
        else if (x>=90) {
               System.out.println("A");
              else if(x>=80&&x<=89){
               System.out.println("B");
              }else if(x>=70&&x<=79){
                  System.out.println("C");
                   
              }else if(x>=60&&x<=69){
                  System.out.println("D");
              }else if(x<=59){
                  System.out.println("E");
              }
              
    }
}

  5.输入三个整数x,y,z,请把这三个数由小到大输出(知识点:条件语句)

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package test3;
import java.util.Scanner;
 
public class shangji2 {
 
    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();
        System.out.println("请输入y的值");
        int y=input.nextInt();
        System.out.println("请输入z的值");
        int z=input.nextInt();
         if(x>y && y>z) {
                System.out.println("输出"+z+","+y+","+x);
            }else if(x>z && z>y) {
                System.out.println("输出"+y+","+z+","+x);
            }else if(y>x && x>z) {
                System.out.println("输出"+z+","+x+","+y);
            }else if(y>z && z>x) {
                System.out.println("输出"+x+","+z+","+y);
            }else if(z>y && y>x) {
                System.out.println("输出"+x+","+y+","+z);
            }else if(z>x && x>y) {
                System.out.println("输出"+y+","+x+","+z);
            }
posted @ 2020-05-23 09:29  学习不错  阅读(85)  评论(0编辑  收藏  举报