public class GuessingGame { public static void main(String[] args) { TextIO.putl
ID: 3660462 • Letter: P
Question
public class GuessingGame {
public static void main(String[] args) {
TextIO.putln("Let's play a game. I'll pick a number between");
TextIO.putln("1 and 100, and you try to guess it.");
boolean playAgain;
do {
playGame(); // call subroutine to play one game
TextIO.put("Would you like to play again? ");
playAgain = TextIO.getlnBoolean();
} while (playAgain);
TextIO.putln("Thanks for playing. Goodbye.");
} // end of main()
/**
* This subroutine lets the user play one guessing game and tells
* the user whether he won or lost.
*/
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;
TextIO.putln();
TextIO.put("What is your first guess? ");
while (true) {
usersGuess = TextIO.getInt(); // Get the user's guess.
guessCount++;
if (usersGuess == computersNumber) {
TextIO.putln("You got it in " + guessCount
+ " guesses! My number was " + computersNumber);
break; // The game is over; the user has won.
}
if (guessCount == 6) {
TextIO.putln("You didn't get the number in 6 guesses.");
TextIO.putln("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)
TextIO.put("That's too low. Try again: ");
else if (usersGuess > computersNumber)
TextIO.put("That's too high. Try again: ");
}
TextIO.putln();
} // end of playGame()
} // end of class GuessingGame
Explanation / Answer
public class GuessingGame
{
public static void main(String[] args)
{
TextIO.putln("Let's play a game. I'll pick a number between");
TextIO.putln("1 and 100, and you try to guess it.");
boolean playAgain;
// count of games and games won
int numGames = 0;
int gamesWon = 0;
do {
if(playGame())
gamesWon++;
numGames++;
// call subroutine to play one game
TextIO.putln();
TextIO.put("Would you like to play again? ");
playAgain = TextIO.getlnBoolean();
}
while (playAgain);
TextIO.putln("Thanks for playing. Goodbye.");
TextIO.putln("You won "+gamesWon+" out of "+numGames);
} // end of main()
/**
* This subroutine lets the user play one guessing game and tells
* the user whether he won or lost.
*/
// return whether the game was won
static boolean 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;
TextIO.putln();
TextIO.put("What is your first guess? ");
while (true)
{
usersGuess = TextIO.getInt();
// Get the user's guess.
guessCount++;
if (usersGuess == computersNumber)
{
TextIO.putln("You got it in " + guessCount + " guesses! My number was " + computersNumber);
return true;
// The game is over; the user has won.
}
if (guessCount == 6)
{
TextIO.putln("You didn't get the number in 6 guesses.");
TextIO.putln("You lose. My number was " + computersNumber);
return false;
// 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)
TextIO.put("That's too low. Try again: ");
else if (usersGuess > computersNumber)
TextIO.put("That's too high. Try again: ");
}
return false;
} // end of playGame()
} // end of class
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