► |  | How to Design Programs Teachpacks

1 | Ht DP Teachpacks
2 | Ht DP/ 2e Teachpacks

▼ | 1 | Ht DP Teachpacks

1.1 | Manipulating Images: "image.rkt"
1.2 | Simulations and Animations: "world.rkt"
1.3 | Converting Temperatures: "convert.rkt"
1.4 | Guessing Numbers: "guess.rkt"
1.5 | Master Minding: "master.rkt"
1.6 | Playing Master Mind: "master-play.rkt"
1.7 | Simple Drawing: "draw.rkt"
1.8 | Hangman: "hangman.rkt"
1.9 | Playing Hangman: "hangman-play.rkt"
1.10 | Managing Control Arrows: "arrow.rkt"
1.11 | Manipulating Simple HTML Documents: "docs.rkt"
1.12 | Working with Files and Directories: "dir.rkt"
1.13 | Graphing Functions: "graphing.rkt"
1.14 | Simple Graphical User Interfaces: "gui.rkt"
1.15 | An Arrow GUI: "arrow-gui.rkt"
1.16 | Controlling an Elevator: "elevator.rkt"
1.17 | Lookup GUI: "lkup-gui.rkt"
1.18 | Guess GUI: "guess-gui.rkt"
1.19 | Queens: "show-queen.rkt"
1.20 | Matrix Functions: "matrix.rkt"

On this page:

hangman
hangman-list

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#### 1.8`` Hangman: "hangman.rkt"

(require htdp/hangman) | package: htdp-lib

The teachpack implements the callback functions for playing a Hangman game, based on a function designed by a student. The player guesses a letter and the program responds with an answer that indicates how many times, if at all, the letter occurs in the secret word.

> procedure (hangman make-word reveal draw-next-part) → true
> make-word : (-> symbol? symbol? symbol? word?)
> reveal : (-> word? word? word?)
> draw-next-part : (-> symbol? true)

Chooses a “secret” three-letter word and uses the given functions to manage the Hangman game.

> > procedure
> > (hangman-list |  | reveal-for-list |  |  |  |
> > |  | draw-next-part) |  | → |  | true
> | reveal-for-list |  | : |  |
> (-> symbol? (list-of symbol?) (list-of symbol?)
> (list-of symbol?))
> draw-next-part : (-> symbol? true)

Chooses a “secret” word—a list of symbolic letters—and uses the given functions to manage the Hangman game: reveal-for-list determines how many times the chosen letter occurs in the secret word; draw-next-part is given the symbolic name of a body part and draws it on a separately managed canvas.

In addition, the teachpack re-exports the entire functionality of the drawing library; see Simple Drawing: "draw.rkt" for documentation.

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