A software house is a company that builds and implements custom software solutions for its clients. Suppose you are working as programmer in some software house name Engineering Tech and client came...

A software house is a company that builds and implements custom software solutions for its clients. Suppose you are working as programmer in some software house name Engineering Tech and client came to your software house to get the solution of his problem. His problem is he wants a calculation device in which same name function can perform all the arithmetic operations (*, /, +, -). Your CEO called you to complete the
task, he assigned you the task to write a oop c++ program to
 create a class calculation having a Pure Virtual function of the name cal ( )
 You have to drive 4 classes from the parent class calculation
 Each derived class overrides the cal ( ) function
 Each cal ( ) function perform specific arithmetic operation on 2 data members in each derived class.