第四次作业

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)

package mjm;

import java.util.Scanner;
public class ddd {
     public static void main(String[] args) {
           
            System.out.println("请输入x");
            Scanner input=new Scanner(System.in);
            int x=input.nextInt();
            if(x==1){
                System.out.println("1");
            }
            else if(x==5){
                System.out.println("5");
            }
            else if(x==10){
                System.out.println("10");
            }
            else{
                System.out.println("none");
            }
        }

    }

 

 2.用switch结构实现第1题

package mjm;

import java.util.Scanner;
public class ddd {
      public static void main(String[] args) {

            
          System.out.println("请输入x");
            Scanner input=new Scanner(System.in);
            int x=input.nextInt();
            switch(x){
            case 1:
                System.out.println("1");
            break;
            case 5:
                System.out.println("5");
            break;
            case 10:
                System.out.println("10");
            break;
            default:
                System.out.println("none");
                break;
            }
        }
    }

 

 

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)

package mjm;

import java.util.Scanner;
public class ddd {
      public static void main(String[] args) {
           
            System.out.println("请输入x");
            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&&x%6!=0){
                System.out.println("能被5整除");
            }
            else if(x%6==0&&x%5!=0){
                System.out.println("能被6整除");
            }
            else{
                System.out.println("不能被5或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)

package mjm;

import java.util.Scanner;
public class ddd {
      public static void main(String[] args) {
          System.out.println("请输入0-100之间的分数x");
            Scanner input=new Scanner(System.in);
            int x=input.nextInt();
            if(x<60){
               System.out.println("E");
            }
            else if(x<=70){
                System.out.println("D");
            }
            else if(x<=80){
                System.out.println("C");
            }
            else if(x<=90){
                System.out.println("B");
            }
            else if(x<=100){
                System.out.println("A");
            }
            else{
                System.out.println("分数无效");
            }
        }

    }

 

 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)

package mjm;

import java.util.Scanner;
public class ddd {
  public static void main(String[] args) {

       ddd nc = new ddd();
          int a, b, c;

          System.out.println("输入三个数字");
          a = nc.input();
          b = nc.input();
          c = nc.input();
     

          if (a > b) {
              int t = a;
              a = b;
              b = t;
          }

          if (a > c) {
              int t = a;
              a = c;
              c = t;
          }

          if (b > c) {
              int t = b;
              b = c;
              c = t;
          }
          System.out.println(a + " " + b + " " + c);
      }

      public int input() {
          int value = 0;
          Scanner s = new Scanner(、
System.in);
          value = s.nextInt();
          return value;
      }

      public void compare(int x, int y) {
          if (x > y) {
              int t = x;
              x = y;
              y = t;
          }
      }
  }

 

posted @ 2020-03-26 12:42  mjmmmmmua  阅读(147)  评论(0编辑  收藏  举报