Word Problem: update-player

Referenced from lesson Player Animation

Directions: The player moves up and down by 20 pixels each time. Write a function called update-player, which takes in the player’s y-coordinate and the name of the key pressed ("up" or "down"), and returns the new y-coordinate.

Contract and Purpose Statement

Every contract has three parts…​

; _____________:______________->______

; __________________________________________________

Examples

Write some examples, then circle and label what changes…​

(EXAMPLE (_____________ _________)___________)

(EXAMPLE (_____________ _________)___________)

(EXAMPLE (_____________ ___________)___________)

(EXAMPLE (_____________ ___________)___________)

Definition

Write the definition, giving variable names to all your input values…​

(define (_____________ ______)

__(____

_____[___________________ _________]

_____[_____________________ _________]

_____[____ __]

__))

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