3.26上机练习

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 text1;

import java.util.Scanner;

public class test14 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //输入变量值x=1输出x=1,x=5--x=5,x=10--x=10,其他输出x=none 
        @SuppressWarnings("resource")
        Scanner sc=new Scanner(System.in);
        int x=sc.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

package text1;

import java.util.Scanner;

public class test14 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
      
        @SuppressWarnings("resource")
        Scanner sc=new Scanner(System.in);
        int x=sc.nextInt();
        switch(x) {
        case 1:System.out.println("x=1");break;
        case 5:System.out.println("x=5");break;
        case 10:System.out.println("x=10");break;
        default :System.out.println("x=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 text1;

import java.util.Scanner;

public class test14 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
       
        @SuppressWarnings("resource")
        Scanner sc=new Scanner(System.in);
        int x=sc.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 if(x%5!=0&&x%6!=0) {
            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 text1;

import java.util.Scanner;

public class test14 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //A(90-100),B(80-89),C,D,E
        @SuppressWarnings("resource")
        Scanner sc=new Scanner(System.in);
        int x=sc.nextInt();
        if(x>=0&&x<=100) {
            if(x<=100&&x>=90) {
                System.out.println("A");
            }else if(x<90&&x>=80) {
                System.out.println("B");
            }else if(x<80&&x>=70) {
                System.out.println("C");
            }else if(x<70&&x>=60) {
                System.out.println("D");
            }else if(x<60&&x>=0) {
                System.out.println("E");
            }
        }else {
            System.out.println("此分数无效");
        }
    }

}

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 text1;

import java.util.Scanner;

public class test14 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //A(90-100),B(80-89),C,D,E
        @SuppressWarnings("resource")
        Scanner sc=new Scanner(System.in);
        int a=sc.nextInt();
        int b=sc.nextInt();
        int c=sc.nextInt();
        if(a>b&&b>c) {
            System.out.println(c+"<"+b+"<"+a);
        }else if(a>b&&b<c) {
            System.out.println(b+"<"+c+"<"+a);
        }else if(b>a&&a>c) {
            System.out.println(c+"<"+a+"<"+b);
        }else if(b>c&&c>a) {
            System.out.println(a+"<"+c+"<"+b);
        }else if(c>a&&a>b) {
            System.out.println(b+"<"+a+"<"+c);
        }else if(c>b&&b>a) {
            System.out.println(a+"<"+b+"<"+c);
        }
    }

}

 

posted @ 2020-03-26 11:20  小范是个画家  阅读(355)  评论(0编辑  收藏  举报