第四次作业

package com.xuexiao;

import java.util.Scanner;

public class Text3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //1.输入变量x,如果1 输出1 如果5 输出5 如果10 输出10 除了以上几个 都输出x=none.
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入一个数:");
        int x = sc.nextInt();
        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");
        }
        else {
            System.out.println("x=none");
        }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //2.switch实现1
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入一个数:");
        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");
        }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text3 {

    public static void main(String[] args) {
    /*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）*/
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入一个数:");
        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) {
            System.out.println("能被5整除");
        }else if(x % 6 == 0) {
            System.out.println("能被6整除");
        }else {
            System.out.println("不能被5和6整除");
        }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text3 {

    public static void main(String[] args) {
        /*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）*/
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入一个数:");
        int x = sc.nextInt();
        if(0 <= x && x<=100 ) {
            if (x >=90 && x<=100) {
                System.out.println("等级为A");
            }else if (x >=80 && x<=89) {
                System.out.println("等级为B");
            }else if (x >=70 && x<=79) {
                System.out.println("等级为C");
            }else if (x >=60 && x<=69) {
                System.out.println("等级为D");
            }else if (x >=50 && x<=59) {
                System.out.println("等级为E");
            }else if( x < 49) {
                System.out.println("太差了");
            }else {
                System.out.println("输入无效");
            }
            }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text3 {

    public static void main(String[] args) {
        /*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）*/
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入第1个数:");
        int x = sc.nextInt();
        System.out.print("请输入第2个数:");
        int y = sc.nextInt();
        System.out.print("请输入第3个数:");
        int z = sc.nextInt();
        int sum = x+y+z;
        int max = ((x>y)?(x>z?x:z):(y>z?y:z));
        int min = ((x<y)?(x<z?x:z):(y<z?y:z));
        int mid = sum - max - min;
        System.out.println("从小到大为:"+min+" "+mid+" "+max);
        
            
        }
            }