麻烦在java写21点和接龙程序

Question

我一直在这个项目上工作了几天，我不知道为什么它不工作。希望一个新的眼睛会有所帮助。当我运行这个时，有几件事情不会发生。

真正有效的唯一一件事是管理用户下注的部分。一些问题包括：

• 它没有带来一个卡片值（应该来自一个从1-13中随机产生一个数字的类）。

• 不等待用户输入0，以吸引更多的卡或不

• 当它说的第三张牌是什么，它说Card@42a57993
• 没有给出总牌值。
• 当我尝试修复问题时，也会发生错误。在cardTotal的补充中，错误表示“操作符+对于参数类型未定义”。

它可能是缺少或有额外的括号，但我找不到他们应该/不应该在哪里。这里是我的代码：

import java.util.Scanner; 

public class Game { 
    private double pot; 
    private double bet; 
    private int answer; 
    private int cardTotal; 

    Card card1 = new Card(); 
    Card card2 = new Card(); 
    Card card3 = new Card(); 

    // constructor 
    public Game(){ 
     pot = 100; 
     bet = 0; 
    } 

    Scanner keyboard = new Scanner(System.in); 

    // GetBetFrom user, prompts user to enter a valid bet, reenter until a valid amount 
    public double getBetFromUser(){ 
     System.out.println("Your current pot is: "+pot); 

     System.out.println("Enter your bet amount"); 
     bet = keyboard.nextDouble(); 

     //Rules for the bet 
     while(bet>pot || bet<0){ 
     if(pot==0){ 
      break; 
     } 
     if(bet>pot){ 
      System.out.println("Sorry, you don't have enough money for that, try again"); 
      bet = keyboard.nextDouble(); 
     } 
     if(bet<0){ 
      System.out.println("That is not a valid bet, please try again"); 
      bet = keyboard.nextDouble(); 
     } 
    } 
    return bet; 
    } 

    // Game mechanics 
    public void gamePlay(){ 
    System.out.println("Your first card is: "+card1); 
    System.out.println("Your second card is: "+card2); 
    cardTotal= card1 + card2; 
    System.out.println("Your total is: "+cardTotal); 
    System.out.println("Enter 0 to draw more, any other number to quit: "); 

    if(answer == 0); { 
     System.out.println("Your next card is: "+card3); 
     System.out.println("Your total is: "); 
    } 
} 

public void results(){ 
    if(cardTotal > 21){ 
     System.out.println("You lose your bet"); 
     pot = pot-bet; 
    } 
    if(cardTotal==21){ 
     System.out.println("You win three times your bet"); 
     pot = pot-bet+(bet*3); 
    } 
    if(cardTotal==20){ 
     System.out.println("You win double your bet amount"); 
     pot = pot-bet+(bet*2); 
    } 
    if(cardTotal<=19){ 
     System.out.println("You win your bet amount"); 
    } 
} 
} 

这是我的卡类

import java.util.Random; 

public class Card { 
private int cardValue; 
Random random = new Random(); 

public Card(){ 
    cardValue = 1; 
} 

public int getCard(){ 
    cardValue = (cardValue + random.nextInt(12)); 
    if(cardValue>10) 
     return 10; 
    else 
     return cardValue; 
} 

public int display(){ 
    switch (cardValue){ 
    case 1: System.out.println("Ace"); 
    break; 
    case 2: System.out.println("Two"); 
    break; 
    case 3: System.out.println("Three"); 
    break; 
    case 4: System.out.println("Four"); 
    break; 
    case 5: System.out.println("Five"); 
    break; 
    case 6: System.out.println("Six"); 
    break; 
    case 7: System.out.println("Seven"); 
    break; 
    case 8: System.out.println("Eight"); 
    break; 
    case 9: System.out.println("Nine"); 
    break; 
    case 10: System.out.println("Ten"); 
    break; 
    case 11: System.out.println("Jack"); 
    break; 
    case 12: System.out.println("Queen"); 
    break; 
    case 13: System.out.println("King"); 
    break; 

    } 
    return cardValue; 
}  

}

Answer 1

我猜的代码，你的错误发生在这里：

cardTotal= card1 + card2; 

---

card1 and card2是Card类型。编译器不知道如何添加它们。

你应该把你的卡总这样的：

cardTotal = card1.cardValue+ card2.cardValue; 

Answer 2

这可能会帮助你。我建议你阅读一下如何引用对象及其方法。通过键盘输入丢失的数据的验证，但是这是你的工作：

import java.util.Scanner; 
public class Game { 
    private double pot; 
    private double bet; 
    private int answer; 
    private int cardTotal; 

    Card card1 = new Card(); 
    Card card2 = new Card(); 
    Card card3 = new Card(); 

    // constructor 
    public Game(){ 
     pot = 100; 
     bet = 0; 
    } 

    Scanner keyboard = new Scanner(System.in); 

    // GetBetFrom user, prompts user to enter a valid bet, reenter until a valid amount 
    public double getBetFromUser(){ 
     System.out.println("Your current pot is: "+pot); 

     System.out.print("Enter your bet amount: "); 
     bet = keyboard.nextDouble(); 

     //Rules for the bet 
     while(bet>pot || bet<0){ 
     if(pot==0){ 
      break; 
     } 
     if(bet>pot){ 
      System.out.println("Sorry, you don't have enough money for that, try again"); 
      bet = keyboard.nextDouble(); 
     } 
     if(bet<0){ 
      System.out.println("That is not a valid bet, please try again"); 
      bet = keyboard.nextDouble(); 
     } 
    } 
    return bet; 
    } 

    // Game mechanics 
    public void gamePlay(){ 
    int first= card1.getCard(); 
    int second = card2.getCard(); 
    int third = card3.getCard(); 
    System.out.println("Your first card is: "+first); 
    System.out.println("Your second card is: "+second); 
    cardTotal= first + second; 
    System.out.println("Your total is: "+cardTotal); 
    System.out.print("Enter 0 to draw more, any other number to quit: "); 
    answer = keyboard.nextInt(); 

    if(answer == 0) { 
     System.out.println("Your next card is: "+third); 
     cardTotal=cardTotal + third; 
    } 
    System.out.println("Your total is: "+cardTotal); 
} 

public void results(){ 
    if(cardTotal > 21){ 
     System.out.println("You lose your bet"); 
     pot = pot-bet; 
    } 
    if(cardTotal==21){ 
     System.out.println("You win three times your bet"); 
     pot = pot-bet+(bet*3); 
    } 
    if(cardTotal==20){ 
     System.out.println("You win double your bet amount"); 
     pot = pot-bet+(bet*2); 
    } 
    if(cardTotal<=19){ 
     System.out.println("You win your bet amount"); 
    } 
} 

public static void main(String[] args) { 
     Game game = new Game(); 
     game.getBetFromUser(); 
     game.gamePlay(); 
     game.results(); 
}  

}