#include <iostream>

#include <cmath>

#include <string>

#include <vector>

using namespace std;

​

class Shape

{

 public:

  virtual ~Shape() { }

  virtual double getArea() = 0;

  virtual double getPerimeter() = 0;

  virtual string getType() = 0;

};

​

class RightTriangle :                

{

 public:

  RightTriangle(double b, double h) 

​

  ~RightTriangle() { }

  double getArea() { return              }

  double getPerimeter() { return sqrt(_b*_b + _h*_h) + _h + _b; }

  string getType() { return "Right Triangle"; }

private:

​

};

​

class Rectangle :                

{

public:

  Rectangle(double b, double h)

​

  ~Rectangle() { }

  double getArea() { return _b * _h;  }

  double getPerimeter() { return               ; }

  string getType() { return "Rectangle"; }

private:

​

};

​

class Square :                    

{

public:

  Square(double s)

​

  // Override other virtual functions as needed

​

​

};

​

int main()

{

  vector<Shape *> shapeList;

​

  int selection = -1;

  while(selection != 0){

    cout << "Choose an option:" << endl;

    cout << "=================" << endl;

    cout << "Enter '0' to quit" << endl;

    cout << "Enter '1 base height' for a right triangle with given base and height" << endl;

    cout << "Enter '2 base height' for a rectangle with given base and height" << endl;

    cout << "Enter '3 side' for a square with given side length" << endl;

    cout << "> ";

    cin >> selection;

    // Right Triangle case

    if(selection == 1){

      double b, h;

      cin >> b >> h;

      shapeList.push_back(new                      );

    }

    // Rectangle case

    else if(selection == 2){

      double b, h;

      cin >> b >> h;

      // Add the rest of the code to allocate a new rectangle

      //  and add it to the shapeList

      shapeList.push_back(new                 );

    }

    // Square case

    else if(selection == 3){

      double s;

      cin >> s;

      // Add the rest of the code to allocate a new square

      //  and add it to the shapeList

      shapeList.push_back(new             );

    }

  }

  cout << endl;

  for (vector<Shape *>::iterator it = shapeList.begin() ;

       it != shapeList.end();

       ++it)

    {

      Shape *s = *it;

      cout << s->getType() << ": Area=" << s->getArea() << " Perim=" << s->getPerimeter() << endl;

      delete s;

    }

  return 0;

}