面向对象第三次作业

1.输入商品单价，数量，求总价。活动8折后抹零，计算活动价。输入付款金额，计算找零并输出

import java.util.Scanner;
public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("输入商品单价");
        double dan=input.nextDouble();
        System.out.println("输入数量");
        int  a=input.nextInt();
        System.out.println("输入付款金额");
        double money=input.nextDouble();
        double s;
        int s1,s2;
        s=dan*a;
        s1=(int)(s*0.8);
        s2=(int)(money-s1);
        System.out.println("总价"+s+"活动金额"+s1+"找钱"+s2);
    }

}

2输入一个三位数，求个位十位百位

import java.util.Scanner;

public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入一个三位数");
        int a = input.nextInt();
        int a1, a2, a3;
        a1 = a / 100;
        a2 = a / 10 % 10;
        a3 = a % 10;
        System.out.println("个位" + a3 + "十位" + a2 + " 百位" + a1);
    }

}

3输入大写字母，转换成对应的小写字母

import java.util.Scanner;

public class TestHello {

    /**
     * @param args
     */
    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));

    }

}

4.输入2个数，用三目运算符，输出较大数

import java.util.Scanner;

public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入两个数");
        double z = input.nextDouble();
        double a = input.nextDouble();
        a = (z < a ? a : z);
        System.out.println(a);
    }

}

 

 5.输入2个数，交换后输出

import java.util.Scanner;

public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入两个数");
        int q1 = input.nextInt();
        int q2 = input.nextInt();
        int a;
        a = q1;
        q1 = q2;
        q2 = a;
        System.out.println(q1 + "," + q2);
    }

}

 

6. 输入两个数，求平方和

import java.util.Scanner;

public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入两个数");
        int q1 = input.nextInt();
        int q2 = input.nextInt();
        System.out.println(q1 * q1 + q2 * q2);
    }

}