Java老虎机循环

时间：2014-11-12 22:21:34

标签： java

我还不熟悉Java，所以我在解决这个老虎机程序时遇到了一些问题。在您第一次运行程序并计算奖励（例如，您下注20美元并赢得40美元，因此您的新金额为120美元）之后，它应该循环回来并提示＆＃34;如何你想打多少赌？＆＃34;再次，然后用新的总和来完成游戏（所以你要花费120美元的一部分而不是游戏开始时给你的100美元），然后继续这样做，直到你的钱用完为止。但是它现在的工作方式，游戏完全重新开始，因此用户每次都会以$ 100开始。有什么提示吗？

import java.util.Random;
import java.util.Scanner; 
import java.io.*;
public class SlotMachineSimulation
{
    public static void main(String [] args)
    {
        Scanner user_input = new Scanner (System.in);
        Random randInt = new Random();

        System.out.print("Welcome to the Slot Machine Simulator!\n" + "\nActions:" + "\n1. Start a new game" + "\n2. View scores" + "\n3. Exit\n");
        System.out.print("\nPlease select an action: ");
        int userAction = user_input.nextInt();

        if (userAction == 1)
        {
            System.out.print("\nBefore the game begins, please enter your name: ");
            String userName = user_input.next();
            System.out.print("\nGame start! You will begin with $100.00." + "\nEnter a negative value to quit the game. " + "Good luck, " + userName + "!\n");

            double startingSum = 100.00;
            double userTotal = 0.0;
            System.out.printf("\nYou currently have: $%.2f\n", startingSum);

            do 
            {
                System.out.print("\nHow much would you like to bet? ");
                double userBet1 = user_input.nextDouble();  
                userTotal = (startingSum - userBet1);

                //Beginning of random number generation 
                int val1 = randInt.nextInt(6) + 1;
                int val2 = randInt.nextInt(6) + 1;
                int val3 = randInt.nextInt(6) + 1;
                String valName1 = " ", valName2 = " ", valName3 = " ";  //For assignment of slot machine names to randomly generated values

                switch (val1)
                {
                    case 1:
                        valName1 = "Cherries";
                        break;
                    case 2:
                        valName1 = "Oranges";
                        break;
                    case 3:
                        valName1 = "Plums";
                        break;
                    case 4:
                        valName1 = "Bells";
                        break;
                    case 5:
                        valName1 = "Melons";
                        break;
                    case 6:
                        valName1 = "Bars";
                        break;
                }

                switch (val2)
                {
                    case 1:
                        valName2 = "Cherries";
                        break;
                    case 2:
                        valName2 = "Oranges";
                        break;
                    case 3:
                        valName2 = "Plums";
                        break;
                    case 4:
                        valName2 = "Bells";
                        break;
                    case 5:
                        valName2 = "Melons";
                        break;
                    case 6:
                        valName2 = "Bars";
                        break;
                }

                switch (val3)
                {
                    case 1:
                        valName3 = "Cherries";
                        break;
                    case 2:
                        valName3 = "Oranges";
                        break;
                    case 3:
                        valName3 = "Plums";
                        break;
                    case 4:
                        valName3 = "Bells";
                        break;
                    case 5:
                        valName3 = "Melons";
                        break;
                    case 6:
                        valName3 = "Bars";
                        break;
                }

                System.out.println("\n-------------------------------");
                System.out.printf("%-12s%-10s%5s\n", valName1, valName2, valName3);
                System.out.print("-------------------------------\n");

                //Beginning of reward calculation
                if (val1 == val2 || val2 == val3 || val1 == val3)
                {
                    System.out.println("\nNumber of matches: 1");
                    double doubleReward = (userBet1 * 2);
                    double postBetSum = (userTotal + doubleReward);
                    System.out.printf("You have won: $%.2f", doubleReward);
                    System.out.printf("\nYou currently have: $%.2f", postBetSum);
                }
                else if (val1 == val2 && val2 == val3)
                {
                    System.out.println("\nNumber of matches: 3");
                    double tripleReward = (userBet1 * 3);
                    double postBetSum = (userTotal + tripleReward);
                    System.out.printf("\nYou have won: $%.2f",tripleReward);
                    System.out.printf("\nYou currently have: $%.2f", postBetSum);
                }
                else
                {
                    System.out.println("\nNumber of matches: 0");
                    System.out.println("You have won: $0.00");
                    System.out.printf("You currently have: $%.2f", userTotal);
                }
            } while (userTotal > 0.00);
        } //end of #1 option
    }
}

4 个答案:

答案 0 :(得分：0)

更改此行并应该正常工作

double userTotal = 100.0;
userTotal -= userBet1;

甚至使用

String valName1 = genName(), valName2 = genName(), valName3 = genName();

和方法

public static String genName()
{
    int ran = new Random().nextInt(6) + 1;
    switch (ran)
    {
        case 1:
            return "Cherries";
        case 2:
            return "Oranges";
        case 3:
            return "Plums";
        case 4:
            return "Bells";
        case 5:
            return "Melons";
        case 6:
            return "Bars";
            default:
                return "Cherries";
    }
}

清除代码=）

答案 1 :(得分：0)

您在每次迭代中从开始总和中减去 userbet，并使用 userTotatl 检查条件。您需要按如下方式分配：

userTotal = startingSum (Before the loop);

在循环内

userTotal-= userbet;

答案 2 :(得分：-1)

代码中的问题：

  1. 对于循环的每次迭代， userTotal 为 100.00-userBet1 。通过以这种方式编写代码，您不会为下一次迭代维护 userTotal 值。
  2. 在你的if-else-if阶梯中，如果第一个条件匹配，那么控制退出if-else-if结构，用户永远不会获得三重奖励。
  3. 在if-else-if块中，您没有维护 userTotal 。您只需将其分配给本地变量 postBetSum 。

    4. 解决方案：

    1. 在循环外声明并初始化 count = 0 变量。内部循环只需将计数器增加1.检查它是否是第一次迭代，即 count == 1 ，然后 userTotal = 100.0-userBet1 。否则 userTotal = userTotal-userBet1
    2. 首先在if-else-if阶梯中创建第二个条件。通过这种方式，你确定如果有三个或两个（根据你的代码）匹配，那么你将获得三重奖励。如果不是那么它将检查下一个else-if块的单个匹配，如果找到则用户将获得双倍奖励。
    3. 您可以通过以下方式 userTotal + = doubleReward 来维护 userTotal 。此声明确保 userTotal 在获得奖励后保留其值。

      4. 所有这一切，加上你可以把你的开关构造放在一个只返回一个字符串而不是写三次的方法中。

      现在试试这个：

      class SlotMachineSimulation
{
 public static String getValName(int val){
    String valName=" ";
    switch (val)
    {
        case 1:
            valName = "Cherries";
            break;
        case 2:
            valName = "Oranges";
            break;
        case 3:
            valName = "Plums";
            break;
        case 4:
            valName = "Bells";
            break;
        case 5:
            valName = "Melons";
            break;
        case 6:
            valName = "Bars";
            break;
    }
    return valName;

}

public static void main(String [] args)
{
    Scanner user_input = new Scanner (System.in);
    Random randInt = new Random();

    System.out.print("Welcome to the Slot Machine Simulator!\n" + "\nActions:" + "\n1. Start a new game" + "\n2. View scores" + "\n3. Exit\n");
    System.out.print("\nPlease select an action: ");
    int userAction = user_input.nextInt();

    if (userAction == 1)
    {
        System.out.print("\nBefore the game begins, please enter your name: ");
        String userName = user_input.next();
        System.out.print("\nGame start! You will begin with $100.00." + "\nEnter a negative value to quit the game. " + "Good luck, " + userName + "!\n");


        double userTotal = 0.0;
        System.out.printf("\nYou currently have: $%.2f\n", 100.00);
        int count=0;
        do 
        {
            System.out.print("\nHow much would you like to bet? ");
            double userBet1 = user_input.nextDouble();
            count++;
            if(count==1){
                userTotal=100.0-userBet1;
            }else{
                userTotal=userTotal-userBet1;
            }


            //Beginning of random number generation 
            int val1 = randInt.nextInt(6) + 1;
            int val2 = randInt.nextInt(6) + 1;
            int val3 = randInt.nextInt(6) + 1;

            String valName1,valName2,valName3;  //For assignment of slot machine names to randomly generated values

            valName1=getValName(val1);
            valName2=getValName(val2);
            valName3=getValName(val3);

            System.out.println("\n-------------------------------");
            System.out.printf("%-12s%-10s%5s\n", valName1, valName2, valName3);
            System.out.print("-------------------------------\n");

            //Beginning of reward calculation
            if (val1 == val2 && val2 == val3 && val3==val1)//check this condition first otherwise even after matching these values user never get more than double
            {
                System.out.println("\nNumber of matches: 1");
                double doubleReward = (userBet1 * 2);
                userTotal+=doubleReward;

                System.out.printf("You have won: $%.2f", doubleReward);
                System.out.printf("\nYou currently have: $%.2f", userTotal);
            }
            else if (val1 == val2 || val2 == val3 || val1 == val3)
            {
                System.out.println("\nNumber of matches: 3");
                double tripleReward = (userBet1 * 3);
                userTotal+=tripleReward;

                System.out.printf("\nYou have won: $%.2f",tripleReward);
                System.out.printf("\nYou currently have: $%.2f", userTotal);
            }
            else
            {
                System.out.println("\nNumber of matches: 0");
                System.out.println("You have won: $0.00");
                System.out.printf("You currently have: $%.2f", userTotal);
            }
        } while (userTotal > 0.00);
    } //end of #1 option
    user_input.close();
 }
}

答案 3 :(得分：-2)

很简单，在循环开始时，您将总计分配为：

userTotal = (startingSum - userBet1);

这转换为

userTotal = ($100 - userBet1);

很明显，每轮结束后用户都会重置为100美元。

请改为尝试：

double userTotal = startingSum;
...
userTotal -= userBet1;

此代码还有其他几个问题（例如三个相同的case语句体，应该用循环压缩成一个），老实说，考虑在codereview.stackexchange.com上发布你的程序可能是值得的，作为您可以获得的反馈，可以为您提供更多学习Java和预防错误的方法，例如本程序中的错误。

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