C++       Shape is an abstract class with a pure virtual function: Area(). (2) Circle is inherited from Shape, with a data member Radius, and a member function Area() to get the area of a circle. (3) Triangle is inherited from Shape, with two data members Bottom-length and Height, and a member function Area() to get the area of a triangle.       Please complete the definition of Shape, Circle and Triangle, and define other necessary functions, to let a user can use Shape, Circle and Triangle as follows:       void main( )       {            Shape* p = new Circle(2);            cout << "The area of the circle is: " << PrintArea(*p) << endl;            Triangle triangle (3,4);            cout << "The area of the triangle is: " << PrintArea(triangle) << endl;       delete p;       }       The outputs:            The area of the circle is: 12.56       The area of the triangle is: 6       //Your codes with necessary explanations:               My code:       #include   using namespace std;   class Shape   {    public:    double area;     virtual void Area() = 0;     void PrintArea();   };   class Triangle : public Shape   {     double Bottom_length, Height;    public:     Triangle(double l, double h)     {     Bottom_length=l;       Height = h;     }     void Area()     {      area= 0.5* Bottom_length*Height;     }     void PrintArea(){         cout<

C++

Shape is an abstract class with a pure virtual function: Area(). (2) Circle is inherited from Shape, with a data member Radius, and a member function Area() to get the area of a circle. (3) Triangle is inherited from Shape, with two data members Bottom-length and Height, and a member function Area() to get the area of a triangle.

Please complete the definition of Shape, Circle and Triangle, and define other necessary functions, to let a user can use Shape, Circle and Triangle as follows:

void main( )

{

     Shape* p = new Circle(2);

     cout << "The area of the circle is: " << PrintArea(*p) << endl;

     Triangle triangle (3,4);

     cout << "The area of the triangle is: " << PrintArea(triangle) << endl;

delete p;

}

The outputs:

     The area of the circle is: 12.56

The area of the triangle is: 6

//Your codes with necessary explanations:

My code:

#include <iostream>

using namespace std;

class Shape

{

 public:

 double area;

  virtual void Area() = 0;

  void PrintArea();

};

class Triangle : public Shape

{

  double Bottom_length, Height;

 public:

  Triangle(double l, double h)

  {

  Bottom_length=l;

    Height = h;

  }

  void Area()

  {

   area= 0.5* Bottom_length*Height;

  }

  void PrintArea(){

      cout<<area;

}

};

class Circle : public Shape

{

  double Radius;

public:

 Circle(double r)

 {

   Radius=r;

 }

 void Area(){

   area=3.14*Radius*Radius;

 }

 void PrintArea(){

   cout<<area;

 }

};

 Void main()

{

 Shape* p = new Circle(2);

     cout << "The area of the circle is: " << PrintArea(*p) << endl;

     Triangle triangle (3,4);

     cout << "The area of the triangle is: " << PrintArea(triangle) << endl;

delete p;

}

Please remove errors and run this code