Referenced from lesson Character Animation
Directions: Use the Design Recipe to write a function update-danger, which takes in the danger’s x-coordinate and produces the next x-coordinate.
Contract and Purpose Statement |
Every contract has three parts…
; _____________:_______->______
; ________________________________________________________
Examples |
Write some examples, then circle and label what changes…
(EXAMPLE (_____________ ____)__________)
(EXAMPLE (_____________ ____)__________)
Definition |
Write the definition, giving variable names to all your input values…
(define (_____________ __)
__________)
Directions: Use the Design Recipe to write a function update-target, which takes in the danger’s x-coordinate and produces the next x-coordinate.
Contract and Purpose Statement |
Every contract has three parts…
; _____________:_______->______
; ________________________________________________________
Examples |
Write some examples, then circle and label what changes…
(EXAMPLE (_____________ ____)__________)
(EXAMPLE (_____________ ____)__________)
Definition |
Write the definition, giving variable names to all your input values…
(define (_____________ __)
__________)
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
Bootstrap:Algebra by Emmanuel Schanzer, Jen Poole, Ed Campos Jr, Flannery Denny, and Dorai Sitaram
is licensed under a
Creative Commons 4.0 Unported License.
Based on a work at www.BootstrapWorld.org.
Permissions beyond the scope of this license may be available by contacting
schanzer@BootstrapWorld.org.