3.19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。

package work;

import java.util.Scanner;

public class Test12 {

    /**
     * @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 price = input.nextDouble();
        System.out.println("输入数量");
        int num = input.nextInt();
        double sum = price * num;
        int discount = (int) (sum * 0.8);
        System.out.println("输入付款金额");
        int fuKuanJinE = input.nextInt();
        double zhaoLing = fuKuanJinE - discount;
        System.out.println("总价=" + sum + "  " + "活动价=" + discount + "  " + "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。

package work;

import java.util.Scanner;

public class Test13 {

    /**
     * @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.

package work;

import java.util.Scanner;

public class Test14 {

    /**
     * @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

package work;

import java.util.Scanner;

public class Test15 {

    /**
     * @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);
    }

}