1.4 Guessing Numbers: "guess.rkt"
| (require htdp/guess) | package: htdp-lib |
The teachpack provides functions to play a guess-the-number game. Each function display a GUI in which a player can choose specific values for some number of digits and then check the guess. The more advanced functions ask students to implement more of the game.
The check-guess function consumes two numbers: guess, which
is the user’s guess, and target, which is the randomly
chosen number-to-be-guessed. The result is a symbol that reflects the
relationship of the player’s guess to the target.
procedure
(guess-with-gui-3 check-guess) → true
check-guess : (-> digit? digit? digit? number? symbol?)
The check-guess function consumes three digits (digit0,
digit1, digit2) and one number (target). The
latter is the randomly chosen number-to-be-guessed; the three digits are
the current guess. The result is a symbol that reflects the relationship of
the player’s guess (the digits converted to a number) to the target.
Note: digit0 is the least significant digit that the user chose and digit2 is the most significant one.
procedure
(guess-with-gui-list check-guess) → true
check-guess : (-> (list-of digit?) number? symbol?)
The check-guess function consumes a list of digits
(digits) and a number (target). The former is a list
that makes up the user’s guess, and the latter is the randomly chosen
number-to-be-guessed. The result is a symbol that reflects the
relationship of the player’s guess (the digits converted to a number) to
the target.
Note: the first item on digits is the least significant digit that the user chose, and the last one is the most significant digit.