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…​

examples:

_______________ (_________) is_________

_______________ (_________) is_________

_______________ (___________) is_________

_______________ (___________) is_________

end

Definition

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

fun _____________(______):

__ask:

__| ___________ then: ______

__| _____________ then: ______

__| otherwise: __

__end

end

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