Hailperin, Chapter 6

Slide, Rules for Nim

Play a few games on the board

Demo ch6a.rkt (one-digit pile limit)

> (play-with-turns (make-game-state  5 8) 'human)

Here are some I/O functions used in the Nim code

> odd?
> 'odd?
> human
> 'human
> (+ 2 3)
> '(+ 2 3)
> (quote abc)
> 'abc
> (define me 'warford)
> me

> (display "Hello world!")
> (error "You goofed")

Note: This is how the Scheme system prints out the error messages

> (newline)
> (newline)(newline)
> (read)
> (prompt "How old are you? ")
> (+ (prompt "x: ") (prompt "y: "))

Slides, code walkthrough of ch6a.rkt, where the implementation
is a two-digit number

Slide, Alternate implementation

Challenge the class to determine n and m from 648.

Slides for the procedure implementation