Java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("输入单价");
        double danjia = input.nextDouble();
        System.out.println("输入数量");
        int shuliang= input.nextInt();
        double sum = danjia * shuliang;
        int hdj = (int) (sum * 0.8);
        System.out.println("输入付款金额");
        int fuKuanJinE = input.nextInt();
        double zhaoLing = fuKuanJinE - hdj;
        System.out.println("总价=" + sum + "  " + "活动价=" + hdj+ "  " + "付款"
                + fuKuanJinE + "元，" + "找零" + zhaoLing + "元" + "\t");
    }

}

2.输入一个三位数，求个位，十位和百位。

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("请输入一个三位数num");
        int num = input.nextInt();
        int ge;
        int shi;
        int bai;
        ge = num % 100 % 10;
        shi = num % 100 / 10;
        bai = num / 100;
        System.out.println("个位是" + ge + "\t" + "十位是" + shi + "\t" + "百位是" + bai
                + "\t");
    }

}

3.输入大写字母，转成对应的小写字母

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 D=input.next().charAt(0);
        System.out.println("对应的小写字母是"+(char)(D+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("输入一个数a");
        int a = input.nextInt();
        System.out.println("输入一个数b");
        int b = input.nextInt();
        int max = (a > b) ? a : b;
        System.out.println("max=" + max);
    }

}