Question

我有一个模拟两个玩家掷硬币并猜测头或尾的游戏。当第一个玩家获得5分时，游戏假设停止。我已经尝试了一段时间的声明，但它不会停止，直到两者都超过5。编程新手并且可以使用比我更多知识的新眼睛。谢谢大家的帮助。（看看从//开始游戏开始的代码。）

/**
 * This program demonstrates the coin class
 * and plays a game between two players.
 */

public class CoinGame 
{
    public static void main(String[] args)
       {
          final int maxPoints = 5;  // Number of rounds
          String player1Name;        // First player's name
          String player2Name;        // Second player's name

          // Create a Scanner object for keyboard input.
          Scanner keyboard = new Scanner(System.in);

          // Get the player's names.
          System.out.print("Enter the first player's name: ");
          player1Name = keyboard.nextLine();
          System.out.print("Enter the second player's name: ");
          player2Name = keyboard.nextLine();

          // Create the coin.
          Coin coin = new Coin();

          // Create the two players.
          Player player1 = new Player(player1Name);
          Player player2 = new Player(player2Name);

          // Play the game.
          while (player1.getPoints() <= maxPoints || player2.getPoints() <= maxPoints)
          {
             System.out.println("----------------------------");
            // System.out.printf("Now playing round %d.\n", round + 1);

             // Flip the coin.
             coin.toss();

             // The players make their guesses.
             player1.makeGuess();
             player2.makeGuess();

             // Determine the winner of this round.
             roundResults(coin, player1, player2);
          }

          // Display the grand winner.
          displayGrandWinner(player1, player2);
       }

       /**
        *  The roundResults method determines the results of
        *  the current round. The parameters are:
        *  coin: The Coin object
        *  player1: Player #1 object
        *  player2: Player #2 object
        */

       public static void roundResults(Coin coin, Player player1,
                                       Player player2)
       {
          // Show the coin side.
          /*System.out.printf("The coin turned up %d.\n",
                            coin.getSideUp());
                */            
          System.out.printf("The coin turned up: %s\n", coin.getSideUp());

          // Check each player's guess and award points.
          checkGuess(player1, coin);
          checkGuess(player2, coin);
       }

       /**
        *  The checkGuess method checks a player's guess against
        *  the coin's result. The parameters are:
        *  player: The Player object to check.
        *  coin: The Coin object.
        */

       public static void checkGuess(Player player, Coin coin)
       {
          final int POINTS_TO_ADD = 1; // Points to award winner
          String guess = player.getGuess();           // Player's guess
          String coinResult = coin.getSideUp(); // Heads or Tails

          // Display the player's guess.
          System.out.printf("The player %s guessed %s.\n", 
                            player.getName(), player.getGuess());

          // Award points if the player guessed correctly.
          if (guess.equalsIgnoreCase(coinResult))
          {
             player.addPoints(POINTS_TO_ADD);
             System.out.printf("Awarding %d point(s) to %s.\n",
                               POINTS_TO_ADD, player.getName());
          }
       }

       /**
         *  The displayGrandWinner method displays the game's grand winner.
         *  The parameters are:
         *  player1: Player #1
         *  player2: Player #2
        */

       public static void displayGrandWinner(Player player1, Player player2)
       {
          System.out.println("----------------------------");
          System.out.println("Game over. Here are the results:");
          System.out.printf("%s: %d points.\n", player1.getName(), 
                            player1.getPoints());
          System.out.printf("%s: %d points.\n", player2.getName(),
                            player2.getPoints());

          if (player1.getPoints() > player2.getPoints())
             System.out.println(player1.getName() + " is the grand winner!");
          else if (player2.getPoints() > player1.getPoints())
             System.out.println(player2.getName() + " is the grand winner!");
          else
             System.out.println("Both players are tied!");
       }


}

Answer 1

更改

while (player1.getPoints() <= maxPoints || player2.getPoints() <= maxPoints)

到

while (player1.getPoints() <= maxPoints && player2.getPoints() <= maxPoints)

Answer 2

while循环：

<html>
    <head>
        <!--Load the AJAX API-->
        <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script>
        <script type="text/javascript">

            // Load the Visualization API and the piechart package.
            google.charts.load('current', {'packages': ['corechart']});

            // Set a callback to run when the Google Visualization API is loaded.
            google.charts.setOnLoadCallback(drawChart);

            function drawChart() {
                var jsonData = $.ajax({
                    url: "getData.php",
                    dataType: "json",
                    async: false
                }).responseText;

                jsonData = JSON.parse(jsonData);

                jsonData = jsonData.channels[2].values;

                var dataArray = [['ts', 'values']];
                for (var i = 0; i < jsonData.length; i++)
                {
                    var tempArray = [jsonData[i].ts, parseFloat(jsonData[i].value.replace(",", "."))];
                    dataArray.push(tempArray);
                }

                // Create our data table out of JSON data loaded from server.
                var data = google.visualization.arrayToDataTable(
                        dataArray
                        );                

                var options = {
                    hAxis: {title: 'TIME->  "TS" Variable', titleTextStyle: {color: '#333'}},
                    vAxis: {title: 'Values', titleTextStyle: {color: '#333'}}

                };

                // Instantiate and draw our chart, passing in some options.
                var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));
                chart.draw(data, options);
            }

        </script>
    </head>

    <body>
        <!--Div that will hold the pie chart-->
        <div id="chart_div" style="width: 100%; height: 500px;"></div>
    </body>
</html>

应改为：

while (player1.getPoints() <= maxPoints || player2.getPoints() <= maxPoints)

原因是while (player1.getPoints() <= maxPoints && player2.getPoints() <= maxPoints)意味着while循环不会退出，除非BOTH玩家大于5，而不是一个。将其更改为||意味着仅在两者都为真时执行循环。

当玩家得到5分时，无法弄清楚如何让游戏停止。

2 个答案: