예제 자판기 업그레이드

package day4;

import java.util.Scanner;

public class Ex05_drink {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

int balance = 10000;

int coke = 1000;

int cider = 1200;

int milk = 1500;

String list = "";

while(true) {

System.out.printf("====자판기==== 현재 잔액 : %,d원\n",balance);

System.out.println("1.콜라(1000원) 2.사이다(1200원) 3.우유(1500원) 4.충전 5.종료");

System.out.println("메뉴 선택 >>");

int menu = sc.nextInt();

if(menu == 5) {

System.out.println("자판기 종료");

break;

}else if (menu == 4 || balance < 0) {

System.out.println("충전할 금액을 입력해주세요");

int addbalance = sc.nextInt();

balance = addbalance+balance;

}else if(menu < 0 || menu > 5) {

System.out.println("주어진 메뉴에서 골라주세요");

continue;

}

if(menu == 1 || menu == 2 || menu == 3 ) {

System.out.println("수량 선택 >>");

int quantity = sc.nextInt();

if(quantity < 0) {

System.out.println("수량을 확인해주세요");

continue;

}

if(menu==1) {

if(balance<(quantity*coke)) {

System.out.println("잔액부족입니다");

System.out.println("충전할 금액을 입력해주세요");

int addbalance = sc.nextInt();

balance = addbalance+balance;

continue;

}

balance = (balance-(coke*quantity));

System.out.println("==================");

System.out.println("콜라 "+quantity+"개 구매 "+(coke*quantity)+"원\t"+"남은잔액"+balance+"원");

list += "콜라" + quantity + "개 " + (quantity * coke) + "원 잔액:" + balance + "\n";

}else if(menu==2) {

if(balance<(quantity*cider)) {

System.out.println("잔액부족입니다");

System.out.println("충전할 금액을 입력해주세요");

int addbalance = sc.nextInt();

balance = addbalance+balance;

continue;

}

balance = (balance-(cider*quantity));

System.out.println("==================");

System.out.println("사이다 "+quantity+"개 구매 "+(cider*quantity)+"원\t"+"남은잔액"+balance+"원");

list += "사이다" + quantity + "개 " + (quantity * cider) + "원 잔액:" + balance + "\n";

}else if(menu==3) {

if(balance<(quantity*milk)) {

System.out.println("잔액부족입니다");

System.out.println("충전할 금액을 입력해주세요");

int addbalance = sc.nextInt();

balance = addbalance+balance;

continue;

}

balance = (balance-(milk*quantity));

System.out.println("==================");

System.out.println("우유 "+quantity+"개 구매 "+(milk*quantity)+"원\t"+"남은잔액"+balance+"원");

list += "우유" + quantity + "개 " + (quantity * milk) + "원 잔액:" + balance + "\n";

}else {

System.out.println("수량오류");

}

}

}System.out.println("========영수증========");

System.out.println(list);

System.out.println("잔액"+balance+"원입니다");

}

}