/** * Implements a simple guessing game. The computer selects a random * number in the range 1 to 100, inclusive, and the user tries to guess * it. The user gets up to six guesses. After each wrong guess, the * computer tells the user whether the guess was high or low. If the * user guesses the number within six guesses, the user wins; if the user * makes six incorrect guesses, the user loses. After the game ends, * the computer asks whether the user would like to play again. */ public class GuessingGame { public static void main(String[] args) { System.out.println("Let's play a game. I'll pick a number between"); System.out.println("1 and 100, and you try to guess it."); boolean playAgain; do { playGame(); // call subroutine to play one game System.out.print("Would you like to play again? "); playAgain = TextIO.getlnBoolean(); } while (playAgain); System.out.println("Thanks for playing. Goodbye."); } // end of main() /** * Lets the user play one game. */ static void playGame() { int computersNumber; // A random number picked by the computer. int usersGuess; // A number entered by user as a guess. int guessCount; // Number of guesses the user has made. computersNumber = (int)(100 * Math.random()) + 1; // The value assigned to computersNumber is a randomly // chosen integer between 1 and 100, inclusive. guessCount = 0; System.out.println(); System.out.print("What is your first guess? "); while (true) { usersGuess = TextIO.getInt(); // Get the user's guess. guessCount++; if (usersGuess == computersNumber) { System.out.println("You got it in " + guessCount + " guesses! My number was " + computersNumber); break; // The game is over; the user has won. } if (guessCount == 6) { System.out.println("You didn't get the number in 6 guesses."); System.out.println("You lose. My number was " + computersNumber); break; // The game is over; the user has lost. } // If we get to this point, the game continues. // Tell the user if the guess was too high or too low. if (usersGuess < computersNumber) System.out.print("That's too low. Try again: "); else if (usersGuess > computersNumber) System.out.print("That's too high. Try again: "); } System.out.println(); } // end of playGame() } // end of class GuessingGame