+;; tldr; AGPLv3+
+;; copyright info at bottom
+(use-modules (skribilo source c))
+
+(document
+ :title [square]
+ (chapter
+ :title (source :language c [square()\;])
+ :number #f
+ (p [here's the output of ,(prog (source :language c [square()\;]))])
+ (figure
+ :legend "square();"
+ (image :file "square.png" :height 500))
+ (p [openscad draws a square for the code
+ ,(source :language c [square()\;]).])
+ (p [there are a couple other things worth noting here.
+ square is followed by an open and close parenthesis
+ ,(source :language c [()]), and then by a semicolon
+ ,(source :language c [\;])]))
+ (chapter
+ :title [square(1)\;]
+ :number #f
+ (p [here's the output of ,(source :language c [square(1)\;])])
+ (figure
+ :legend "square(1);"
+ (image :file "square1.png" :height 500))
+ (p [note that it's identical to the
+ ,(source :language c [square()\;]) output. this is because
+ by default, openscad guesses a value of 1 whenever a value
+ is left unspecified.]))
+ (chapter
+ :title [square(2)\;]
+ :number #f
+ (p [here's the output of ,(source :language c [square(2)\;])])
+ (figure
+ :legend "square(2);"
+ (image :file "square2.png" :height 500))
+ (p [note that it is twice the size of the prior 2 examples.]))
+ (chapter
+ :title [square(3)\;]
+ :number #f
+ (p [here's the output of ,(source :language c [square(3)\;])])
+ (p [how big do you expect this square to be?])
+ (figure
+ :legend "square(3);"
+ (image :file "square3.png" :height 500)))
+ (chapter
+ :title [quiz on square 1 2 3]
+ :number #f
+ (section
+ :title [questions for simplest square]
+ (p [what's the code for the simplest square?])
+ (p [where is the bottom right corner of the simplest square?]))))
+
+;; Copyright 2016 daniel watson
+
+;; This file is part of challenge-bot.
+
+;; challenge-bot is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU Affero General Public License as
+;; published by the Free Software Foundation, either version 3 of the
+;; License, or (at your option) any later version.
+
+;; challenge-bot is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU Affero General Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public
+;; License along with challenge-bot. If not, see
+;; <http://www.gnu.org/licenses/>.