第二次上机作业

1. 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

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package hgj;
import java.util.Scanner;
public class dfg {

    public static void main(String[] args) {
        Scanner input= new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=input.nextInt();
        if(x==1 || x==5 || x==10) {
            System.out.println("x="+x);
        }else {
            System.out.println("x=none");
        }
    }    
}
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2.用switch结构写第1题
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package huaerzi;
import java.util.Scanner;
public class huada {
    public static void main(String[] args) {
          // TODO Auto-generated method stub
        Scanner huaer= new Scanner(System.in);
        System.out.println("请输入a的值");
        int a=huaer.nextInt();
        switch(a) {
        case 1: 
        case 5: 
        case 10:
            System.out.println("a="+a);break;
        default:
            System.out.println("a=none");
             System.out.println("a=none");}
    }
}
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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 hgj;
import java.util.Scanner;
public class dfg {

    public static void main(String[] args) {
        Scanner input= new Scanner(System.in);
         System.out.println("请输入这个数的值");
            int x=input.nextInt();
            if(x%5==0 && x%6==0) {
                System.out.println(x+"能被5和6整除");
            }else if(x%5==0 ){
                System.out.println(x+"能被5整除");
            }else if(x%6==0) {
                System.out.println(x+"能被6整除");
            }else {
                System.out.println(x+"不能被5或6整除");
            }
        }    
    }
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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
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package huaerzi;
import java.util.Scanner;
public class huada {
    public static void main(String[] args) {
          // TODO Auto-generated method stub
        System.out.println("请输入一个整数");
        Scanner scanner = new Scanner(System.in);
        int grade = scanner.nextInt();
         if ((grade>100)||(grade<0)) {
        System.out.println("无效");
        } else if ((grade>=80)&&(grade<90)) {
        System.out.println("B");
        } else if ((grade>=90)&&(grade<=100)) {
        System.out.println("A");
        } else  if ((grade>=70)&&(grade<80)){
        System.out.println("C");
        } else if ((grade>=60)&&(grade<70)){
        System.out.println("D");
        }else System.out.println("E");
    }
}
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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 xx;

import java.util.Scanner;

public class pika {

    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("请输入x的值");
        int x=sc.nextInt();
        System.out.println("请输入y的值");
        int y=sc.nextInt();
        System.out.println("请输入z的值");
        int z=sc.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);
        }
    }

}
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posted @ 2020-03-26 11:56  清欢渡¥  阅读(73)  评论(0编辑  收藏  举报