java第三次作业

1.输入两个数，交换后输出

package com;

import java.util.Scanner;

public class Test1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("输入第一个数");
        Scanner input=new Scanner(System.in);
        int a=input.nextInt();
        System.out.println("输入第二个数");
        int b=input.nextInt();
        int   c=a;
        a=b;
        b=c;
        System.out.println("交换后第一个是"+a+ " 第二个是是"+b);

    }

}

 

 2.输入两个数，求平方和

package com;

import java.util.Scanner;

public class Test2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("输入a");
        int a=input.nextInt();
        System.out.println("输入b");
        int b=input.nextInt();
        int c=a*a+b*b;
        System.out.println("平方和="+c);

    }

}

 

 3.输入商品总价，数量，求总价。活动八折后抹零，计算活动价。

package com;

import java.util.Scanner;

public class Test3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入单价");
           double price=input.nextDouble();
           System.out.println("请输入数量");
           int num=input.nextInt();
           double sum=price*num;
           System.out.println("总价是"+sum);
            int zhehou = (int) (sum*0.8);
            System.out.println("折后抹零价是"+zhehou);
            System.out.println("支付金额为");
            double pay = input.nextDouble();
            double zl = pay-zhehou;
            System.out.println("找零" +zl);

    }

}

 

 4.输入一个三位数，求个位，十位和百位。

package com;

import java.util.Scanner;

public class Test4 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个三位数");
        int num = input.nextInt();
         int ge = num % 10;
         int bai = num / 100;
         int shi = num / 10 % 10;
         System.out.println("个位是" +ge+"十位是" +shi+"百位是" +bai);

    }

}

 

 5.输入大写字母，转成对应的小写的字母

package com;

import java.util.Scanner;

public class Test5 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("任意输入一个大写字母");
        char b=input.next().charAt(0);
        System.out.println("对应的小写字母是"+(char)(b+32));

    }

}

 

 6.输入两个数，用三目运算符，输出较大数。

package com;

import java.util.Scanner;

public class Test5 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入第一个数");
           int num1=input.nextInt();
           System.out.println("请输入第二个数");
           int num2=input.nextInt();
           int max=num1>num2?num1:num2;
           System.out.println("较大数是"+max);

    }

}