java - 创建 1 位小数

Question

所以我或多或少已经完全完成了运行猜谜游戏的代码。最后它会打印所有比赛的总结果。这包括总游戏数、总猜测数、平均猜测数/游戏数和最佳得分。我已经解决了所有问题，除了我需要平均猜测/游戏显示 1 位小数，但 System.out.printf("Guesses/game = %.1f") 不起作用，我不知道为什么

import java.util.*; //so I can use scanner

public class GuessingGame {
   public static void main(String[] args) {

      Random rand = new Random ();
      int max = 100;
      Scanner input = new Scanner(System.in);
      int guess;
      boolean play = true;
      int totalGames = 0;
      int totalGuesses = 0;
      int bestGame = Integer.MAX_VALUE;

      System.out.println("Can you guess the word?");
      System.out.println("I am sure you cannot guess!");
      System.out.println("Go ahead and try!");
      System.out.println();

      while (play) { //repeats until user enters a statement besides y when asked to play again

         System.out.println("I'm thinking of a number between 1 and " + max + "...");
         int numberToGuess = rand.nextInt(max) + 1;
         int numberOfTries = 0;
         boolean win = false;
         while (!win) {

            System.out.print("Your guess? ");
            guess = input.nextInt();
            numberOfTries++;

            if (guess == numberToGuess) {
               win = true;  
            } else if (guess > numberToGuess) {
               System.out.println("It's lower.");
            } else if (guess < numberToGuess) {
               System.out.println("It's higher.");
            }      
            input.nextLine();
         }
         if (numberOfTries == 1) {
            System.out.println("You got it right in " + numberOfTries + " guess!");
         } else {
            System.out.println("You got it right in " + numberOfTries + " guesses!");
         }   
            totalGames++;
            totalGuesses+= numberOfTries;
            System.out.print("Do you want to play again? ");

            String answer = input.nextLine();
            char firstLetter = answer.charAt(0);
            if (firstLetter == 'y' || firstLetter == 'Y') {
            play = true;  
            } else {
            play = false;     
            bestGame = Math.min(bestGame, numberOfTries);             
         }  
         System.out.println();            
      }

      System.out.println("Overall results:");
      System.out.println("Total games = " + totalGames);  
      System.out.println("Total guesses = " +  totalGuesses);
      System.out.printf("Guesses/game = ", totalGuesses/totalGames);
      System.out.println("Best game = " + bestGame);
   }  
}

Answer 1

totalGuesses和totalGames都是整数，所以当你将它们相除时，你会得到一个整数，而%f需要一个 float 。

而是将 1 转换为 float 以进行浮点除法:

totalGuesses/(double)totalGames