第三次上机作业

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 number21;

import java.util.Scanner;

public class Zcc {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("输入变量x:");
        Scanner input = new Scanner(System.in);
        int x=input.nextInt();
        if(x!=1&&x!=5&&x!=10){
            System.out.println("x=none");
        }else 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");
        }
    }

}

 

 

 

 2.用switch结构实现第1题

package number21;

import java.util.Scanner;

public class Zcc {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("输入变量x:");
        Scanner input=new Scanner(System.in);
        int x=input.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"); 
        }
    }

}

 

 

 

 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 number21;

import java.util.Scanner;

public class Zcc {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入数字:");
        int a=input.nextInt();
        if(a%5==0&&a%6==0){
            System.out.println("可以被5,6整除");
        }else if(a%5==0&&a%6!=0){
            System.out.println("能被5整除");
        }else if(a%5!=0&&a%6==0){
            System.out.println("能被6整除");
        }else if(a%5!=0&&a%6!=0){
            System.out.println("不能被5,6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 number2;

import java.util.Scanner;

public class zcc {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println(" 输入分数:");
        Scanner input = new Scanner(System.in);
        int x=input.nextInt();
        if(x<0||x>100){
            System.out.println("无效");
        }else if(x>=90){
            System.out.println("A");
        }else if(x>=80){
            System.out.println("B");
        }else if(x>=70){
            System.out.println("C");
        }else if(x>=60){
            System.out.println("D");
        }else if(x<60){
            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)

package number2;

import java.util.Scanner;

public class zcc {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("输入三个整数:");
        Scanner input = new Scanner(System.in);
        int a=input.nextInt();
        int b=input.nextInt();
        int c=input.nextInt();
        int d;
        if(a>b){
            d=b;
            b=a;
            a=d;
        }
        if(a>c){
            d=c;
            c=a;
            a=d;
        }
        if(b>c){
            d=c;
            c=b;
            b=d;
        }
        System.out.println(a+" "+b+" "+c);
        
        
}
}

 

posted @ 2020-03-26 12:09  洽多  阅读(188)  评论(0编辑  收藏  举报