Can any explain me overloading concept you can help me out by explaining this code

Question

class Shape
attr_accessor :h, :w
def initialize(h, w)
self.h = h
self.w = w
end

def +(other)
Shape.new(self.h+other.h, self.w+other.w)
end

end

a = Shape.new(7, 4)
b = Shape.new(9, 18)
c = a+b
puts c.h # outputs 16
puts c.w # outputs 22

Answer 1

As i understood, normally you can add with + only integers or floats. when you create a shape object, you could not add its element with + to an element of an other shape object.
overloading means, that you expand the possibility of +.
now you can add 2 quadrilateral for example.
shape.new(self.h + other.h, self.w+ other.w)
means, it takes the weight side of one shape and other shape, add it, and takes height of one shape and other shape, and add it.
the new shape will have the area that is the sum of the 2 shape.
sorry my english

Answer 2

Due to overloaded + operator you can calculate the sum of objects.