Introduction to Perl

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Introduction to Perl

• Unit 10 - Hangman

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Project Hangman

• The project you will be completing is the game of
  Hangman.
• You will give the user a set number of guesses to
  determine what the preset word is.
• Commenting and neat code design are all important
  throughout the program

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Part 1 Welcome to Hangman

• The first part of the Hangman program will be to
  display a welcome screen to the user, using the
  print function you previously learned.
• Write a program that prints your
• welcome screen for Hangman.

Hangman123
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All You Need To Know

• 1. Print exercise
• Print your title screen for hangman. Use \t and
  \n to change the location that your welcome
  message appears on the screen. 2. Input
  exercise
• Prompt the user for a word to be used for
  hangman, and then print that out for them to see.
  (Like echo.) 3. Get Guess exercise
• Get a guess from the user. Print out the first
  letter of the guess. 4. Modified Input with
  Conditional
• Alter your input exercise to ask the user if they
  are satisfied with the word that they entered.
  End the program if they don't like it, at least
  until the next exercise. 5. Modified Input with
  Looping
• Alter exercise four to repeatedly ask them for a
  word until they respond that they are satisfied.
  6. Simple Subroutine exercise
• Write a function that extends the welcome screen
  to also display the state of the game. The
  recommended fields to display would include the
  numbers of guesses left, the correctly guessed
  letters, the incorrectly guessed letters, and the
  masked word. Don't worry about calculating these
  values. Have your function take these values when
  it is invoked, and display them. Run several
  trials with different values to make sure that
  your function is presenting the different values
  that are passed to it as you would like it to.
  (Hint This is essentially a print exercise using
  subroutines.) 7. A Little More with Subroutines
• Transfer the input exercise and the get guess
  exercise into functions in the same file as your
  previous function. The order that the functions
  appear in the file doesn't really matter. Make a
  simple driver (main program) that calls the
  functions in order to display the welcome screen
  or ask the user for the word that they want, show
  the state of the game, and take a guess from the
  user. Don't worry about displaying the state of
  the game a second time, or displaying the word
  correctly at this time. 8. Regular Expression
  Modification for Guessing
• Alter the guess subroutine that had been
  previously modified. Check if the user entered a
  letter for their guess, and if they did not, then
  ask them again to enter a letter. Use regular
  expressions. To check your subroutine, run the
  program. 9. Check the Guess
• Write a new subroutine that takes the secret word
  and the guessed letter, and then two strings,
  which will represent the correct and incorrect
  guesses. Have the function append the guess to
  the appropriate string (correct or incorrect),
  and return the two of them in a list. (Hint
  Concatenate strings with a period.) Assuming the
  guess in incorect incorrect incorrect.guess
  10. Display the Word
• Have this subroutine take in the secret word and
  the correct guesses. You want to create a new
  word that will be displayed, showing the
  correctly guessed letters in their appropriate
  spots, and underscores "hiding" the other
  letters.To construct a new wordFor each letter
  in the word that has been guessed correctly, add
  that onto another the new word. For each letter
  that has not been guessed, add an underscore "_".
  After the loop, return the new word. 11. Check
  the Word
• Write a function that checks to see if all of the
  letters in the word have been guessed and return
  1 (true) if they have or a 0 (false) if there are
  letters that have not been guessed yet. David P
  WaliaLast modified Tue Jul 29 141011 EDT 2003