Question

我有一项任务，因为这要求我创建一个老虎机程序，该程序将继续运行，直到用户用完钱或按零。我无法弄清楚什么样的循环以及用于此循环的变量以使其工作。目前我已经拥有了程序其余部分所需的所有if语句，但是什么样的循环给我带来了麻烦。我认为while循环是可行的方法，但每次实现while循环时，程序都不会停止执行。

import java.util.*;

public class SlotMachine {
public static final int BALANCE=10;
public static void main(String[] args) {
    int bet, remBal=0,winnings1,winnings2;
    int slot1, slot2, slot3;

    Random generator = new Random();
    System.out.println("Starting Balance = $10:00");
    Scanner kbd=new Scanner(System.in);
    System.out.print("Enter a bet $");
    bet=kbd.nextInt();

    if (bet>0&&bet<BALANCE){
        slot1 = generator.nextInt(10);
        slot2 = generator.nextInt(10);
        slot3 = generator.nextInt(10);
        slot1 = 3;
        slot2 = 3;
        slot3 = 3;
        System.out.println(slot1+" "+slot2+" "+slot3);
        if(slot1==slot2&&slot2==slot3&&slot1==slot3){
            System.out.println("You win: "+(double)(slot1+1)*bet);
            winnings1=(slot1+1)*bet;
            remBal=BALANCE-bet+winnings1;
        }else if (slot1==slot2||slot2==slot3){
            System.out.println("You win: "+(double)(slot2*bet)/2);
            winnings2=(slot2*bet)/2;
            remBal=BALANCE-bet+winnings2;
        }else{
            System.out.println("Balance "+(double)(BALANCE-bet));
        }
    }else if(bet==0){
        System.out.println("You earned"+remBal);

    }kbd.close();
}

}

Answer 1

您的问题是请求下注的代码在处理它的块之外。如果您将其转换为while循环，那么您永远不会要求用户进行另一次下注;因此无限循环。

您可能想要的是do-while循环。这意味着请求下注的代码至少执行一次，并且在块结束时检查测试而不是开始。

所以代码的结构应该是：

do {
    // ask for bet
    if (bet > 0) {
        // process bet
    }
} while (bet > 0 && balance > 0);
// print out results

Answer 2

您可以尝试此代码

    System.out.println("Starting Balance = $10:00");
    Scanner kbd = new Scanner(System.in);
    System.out.print("Enter a bet $");
    bet = kbd.nextInt();

    while (bet != 0) {
        // you code
        System.out.print("Enter a bet $");
        bet = kbd.nextInt();
    }
    kbd.close();

Answer 3

public class SlotMachine {
public static final int BALANCE=10;
public static void main(String[] args) {
    int bet, remBal=BALANCE,winnings1,winnings2;
    int slot1, slot2, slot3;


Random generator = new Random();
System.out.println("Starting Balance = $10:00");
Scanner kbd=new Scanner(System.in);
System.out.print("Enter a bet $");
bet=kbd.nextInt();

    while (bet>0 && bet<remBal){
        //Your code for checking wins
        bet = kbd.nextInt();
    }
kbd.close();
}

JAVA简易老虎机循环

3 个答案: