Word Problem: safe-left?

Directions: Use the Design Recipe to write a function ‘safe-left?’, which takes in an x-coordinate and checks to see if it is greater than -50

Contract and Purpose Statement

Every contract has three parts…​

; MMMMMMMMMM:MMMMMMM->MMMMMMM

; M

Examples

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

(EXAMPLE (MMMMMMMMMM MMMM)MMMMMMMMMMM)

(EXAMPLE (MMMMMMMMMM MMMMM)MMMMMMMMMMMM)

Definition

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

(define (MMMMMMMMMM MM)

MMMMMMMMMMM)

These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, and 1738598). CCbadge BS:Games by Jen Poole, Emmanuel Schanzer, Ed Campos Jr, 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.