# File lib/rational.rb, line 124 def + (a) if a.kind_of?(Rational) num = @numerator * a.denominator num_a = a.numerator * @denominator Rational(num + num_a, @denominator * a.denominator) elsif a.kind_of?(Integer) self + Rational.new!(a, 1) elsif a.kind_of?(Float) Float(self) + a else x, y = a.coerce(self) x + y end end