头或尾巴游戏 - 循环问题

Question

import java.util.Scanner; 
import javax.swing.JOptionPane; 
public class Coin { 
    public static void main(String[] args) 
    { 
     boolean validFinalInput = false; 
     boolean validBetInput = false; 
     boolean validGuessInput = false; //Determines if the guess is a valid input 
     boolean validBet = false; //Determines if the bet is valid 
     boolean goAgain = true; 
     double num; //Unparsed Side Determiner 
     double balance = 100; 
     String Bet = null; //Bet Input 
     double bet = 0; //Parsed Bet 
     String Guess = null; //H or T 
     String Side = null; //Determines Side 
     String GoAgain = null; //Y/N Retry input 
     Scanner in = new Scanner(System.in); 

     while (goAgain == true){ //While true, the player will keep playing. 
      num = Math.round(Math.random()); //Declares Number 
      if (num == 1){ 
       Side = "H"; 
      } else if (num == 0){ 
       Side = "T"; 
      } 
      while (validGuessInput == false){ //Determines if the input is valid 
       System.out.println("Guess: (H/T)"); 
       Guess = in.next(); 
      if (Guess.equals("H") || Guess.equals("T")){ 
       validGuessInput = true; 
      } else { 
       JOptionPane.showMessageDialog(null, "Invalid Guess!"); 
       validGuessInput = false; 
      } 
     } 
     while (validBet == false){ 
      while (validBetInput == false){ 
       try { 
        System.out.println("Bet? (Your balance is $" + balance); 
        Bet = in.next(); 
        bet = Double.parseDouble(Bet); 
        if (bet > 0){ 
         validBetInput = true; 
        } 
       } catch (NumberFormatException e) { 
        JOptionPane.showMessageDialog(null, "Invalid Bet!"); 
       } 
      } 
      if (bet <= balance && bet >= 0){ 
       validBet = true; 
      } else { 
       JOptionPane.showMessageDialog(null, "Invalid Bet!"); 
       validBet = false; 
      } 
     } 
     if (Guess.equals(Side)){ 
      balance = balance + (bet * 2); 
      System.out.println("Correct! The side was: " + Side); 
      System.out.println("Your balance is now: $" + balance); 
     } else { 
      balance = balance - bet; 
      System.out.println("Incorrect! The side was: " + Side); 
      System.out.println("Your balance is now: $" + balance); 
     } 
     if (balance == 0){ 
      System.out.println("You ran out of money. Ending Game."); 
      break; 
     } 
     System.out.println("Go again? (Y/N)"); 
     GoAgain = in.next(); 
     while (validFinalInput == false); 
      System.out.println("Go again? (Y/N)"); 
      GoAgain = in.next(); 
      validGuessInput = false; 
      validBet = false; 
      validBetInput = false; 
     if (GoAgain.equals("Y")){ 
      goAgain = true; 
      validFinalInput = true; 
     } else if (GoAgain.equals("N")){ 
      goAgain = false; 
      validFinalInput = true; 
      System.out.println("Thanks for playing! You ended with: $" + balance); 
     } else { 
      System.out.println("Invalid Input!"); 
      } 
     } 
    } 
} 

所以我写了这个代码为“头或尾巴”风格的游戏。它最初的工作，但后来我决定添加一些功能，它破坏。基本上，它到了最后，但卡在最后一个输入（Y/N）上。

有人能告诉我我做错了什么吗？

对缺乏评论感到抱歉。

我也意识到我的变量并不完全遵循约定，所以也很抱歉。

谢谢。

Answer 1

1. 在这里删除分号;

   while (validFinalInput == false);

2. 正确缩进您的代码。

3. 检查你的逻辑在这里;您正在为两个条件（true和false）设置validFinalInput = true。

   if（GoAgain.equals（“Y”））{ ......... validFinalInput = true; }

   else if（GoAgain.equals（“N”））{ ....... validFinalInput = true; }

Answer 2

goAgain的值在以while (goAgain == true){开头的循环中永远不会改变，因为它在while (validBet == false){之前以}结尾。该右括号错位。

Answer 3

你有这个while语句

while (validFinalInput == false); 

这是一个无限循环！由于分号，它永远不会通过这部分代码。如果你像这样重写它，它应该可以工作：

 while (validFinalInput == false) 
    { 
     System.out.println("Go again? (Y/N)"); 
     GoAgain = in.next(); 
     validGuessInput = false; 
     validBet = false; 
     validBetInput = false; 
     if (GoAgain.equals("Y")) 
     { 
     goAgain = true; 
     validFinalInput = true; 
     } 
     else if (GoAgain.equals("N")) 
     { 
      goAgain = false; 
      validFinalInput = true; 
      System.out.println("Thanks for playing! You ended with: $" + balance); 
     } 
     else 
     { 
      System.out.println("Invalid Input!"); 
     } 
    }