Sha256: 15c3a4843c59fd3b6c7652ae27be24c75386b5793423a480b75283452be0eeef
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Contents
# fractions.rb, by Martin Prout
require 'propane'
class Fractions < Propane::App
attr_reader :f, :add, :subtract, :multiply
def setup
size 640, 250
@f = createFont('Arial', 24, true)
third = 1 / 3r # since ruby 2.1.0 (and jruby-9.0.0.0)
quarter = 1 / 4r
format_add = '%s + %s = %s'
format_sub = format_add.gsub('+', '-')
format_mult = format_add.gsub('+', '*')
@add = format(format_add, third, quarter, third + quarter)
@subtract = format(format_sub, third, quarter, third - quarter)
@multiply = format(format_mult, third, quarter, third * quarter)
end
def draw
background 10
text_font(f, 24)
fill(220)
text('Math Blackboard Propane', 80, 50)
text(add, 110, 100)
text(subtract, 110, 150)
text(multiply, 110, 200)
end
end
Fractions.new(title: 'Fraction Sums')
Version data entries
4 entries across 4 versions & 1 rubygems