C++

Use the abstract class shape to define TwoD shape and add all the functionalities to the methods.

Define the instances triangle, square and rectangle in the driver class to test the functionality of the TwoD class you have extended from the shape class.

---------------------------shape.h-----------------------------

template  class Shape { public: Shape(); virtual T getSide(); virtual bool setSide(T x); virtual T getArea(); virtual T getPerimeter(); void display(); ~Shape(); protected: private: T side; // T_sides[numSides]; };

------------------------shape.cpp--------------------------

#include "Shape.h" #include  using namespace std; template  Shape::Shape() { } template  void Shape::display() { cout << "side: " << getSide() << endl; cout << " area: " << getArea() << endl; cout << "perimeter: " << getPerimeter() << endl; } template  bool Shape::setSide(T x) { if (x > 0) { side = x; return true; } else return false; } template  T Shape::getSide() { return side; } template  T Shape::getArea() { return side * side; } template  T Shape::getPerimeter() { return side * 4; } template  Shape::~Shape() { //dtor } int main() { int num; Shape s1; cout << "Enter side of shape(int): "; cin >> num; if (!s1.setSide(num)) { cout << "Please enter a valid side." << endl; } s1.display(); return 0; }