Page 227 - Learn To Program With Scratch

Tell the Hangman sprite to show its next costume.
Reduce the number of remaining trials by 1.
If the user has exhausted all trials.

Tell the Helper sprite to show the correct answer.
Then display an image that tells the user that he or
she has lost the game.
End the game.

If the user still has more trials, tell the Helper
sprite to show the remaining number of trials.

Figure 8-28: The ProcessWrongGuess procedure

If the player’s letter was correct, the ProcessCorrectGuess shown in
Figure 8-29 should be called instead of ProcessWrongGuess.

Tell the Helper sprite to show the
correctly guessed letter.
If there are no more letters to guess,
show the win costume and end the
game.

Figure 8-29: The ProcessCorrectGuess procedure

ProcessCorrectGuess broadcasts Update to show the letter the player
guessed correctly. It then checks the value of qmarkCount. If qmarkCount is 0,
the player has guessed all of the letters correctly, so the Driver sprite shows
its win costume and ends the game.

try it out 8-7
The Hangman program doesn’t validate the user input; you could enter a non-
alphabetic character or even an entire word . Modify the program so that it rejects
any invalid input by the user .

String Processing 205

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