第三次作業

import java.util.Scanner;

public class work1 {

    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("請輸入商品單價");
        int price=input.nextInt();
        System.out.println("請輸入商品數量");
        int count=input.nextInt();
        int sum=price*count;
        System.out.println("商品總價是"+sum);
        double discount=sum*0.8;
        System.out.println("商品活動價是"+discount);
        System.out.println("請輸入付款金額");
        int payment=input.nextInt();
        double change=payment-discount;
        System.out.println("找零"+change);


    }

}      

import java.util.Scanner;

public class work2 {

    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("請輸入一個三位數");
        int a=input.nextInt();
        int b,c,d;
        d=a%10;
        System.out.println("個位上的數是"+d);
        c=a/10%10;
        System.out.println("十位上的數是"+c);
        b=a/100;
        System.out.println("百位上的數是"+b);
    }

}      

import java.util.Scanner;

public class work3 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("請輸入字元串：");
        String character = sc.nextLine();
        
    
        char[] r=character.toCharArray();
        for (int i = 0; i < r.length; i++) {
        if ((int)r[i] >= 65 && (int)r[i] <= 90) {
        r[i] += 32;
        } else if ((int)r[i] >= 97 && (int)r[i] <= 122) {
        r[i] -= 32;
        }
        }
        for (int i = 0; i < r.length; i++) {
        System.out.print(r[i]+" ");
        }

    }

}      

import java.util.Scanner;

public class work4 {

    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        System.out.println("輸入第一個數");
        int a=input.nextInt();
        System.out.println("輸入第二個數");
        int b=input.nextInt();
        int c;
        c=a>b?a:b;
        System.out.println("最大值為"+c);
    }

}