Questions about my program and Polymorphism

Posted by Strobe_ on Stack Overflow See other posts from Stack Overflow or by Strobe_
Published on 2013-10-22T21:38:10Z Indexed on 2013/10/22 21:53 UTC
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polymorphism

Ok, so basically I'm creating a program which allows the user to select a shape (triangle, square, circle) and then it takes in a int and calculates the boundary length and area.

I have no problem doing this and have a program that's working perfectly. (https://gist.github.com/anonymous/c63a03c129560a7b7434 4 classes) But now I have to implement this with polymorphism concepts and I'm honestly struggling as to how to do it.

I have a basic idea of what I want to do when it comes to inheritance

                                       Main
                                         |
                                       Shapes
                                       /  |  \
                                triangle circle square

But I don't understand how I'm supposed to override when all the methods within the triangle/square/circle classes are unique, there are no "abstract" methods as such that I could inherit from the "Shapes" class.

If somebody could make look quickly at the code I linked and suggest a way to do this it would be much appreciated.

Sorry if I was bad at explaining this. Thanks.

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