4) Define a child class named Square from base class \underline{Rectangle}. Class Square also has a one-parameter constructor and a copy constructor. Square is a concrete class. (5 points)
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The Rectangle class should have two private member variables, length and width, and a public member function to calculate the area. ```cpp class Rectangle { private: int length; int width; public: Rectangle(int l, int w) { length = l; Show more…
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