215: Create a C++ program that uses single inheritance to model a simple shape hierarchy. Implement a base class "Shape" with a virtual function "printArea." Derive classes "Rectangle" and "Triangle" from "Shape" and override the "printArea" function to calculate and display their respective areas.

 

// Create a C++ program that uses single inheritance to model a simple shape hierarchy.

// Implement a base class "Shape" with a virtual function "printArea." Derive classes

// "Rectangle" and "Triangle" from "Shape" and override the "printArea" function to

// calculate and display their respective areas.

#include <iostream>

using namespace std;

class Shape

{

public:

    virtual void printArea() {cout << "Make object of specific shape\n";}

};

class Rectangle : protected Shape

{

private:

    float length, width;

public:

    Rectangle(float l = 0, float w = 0) { length = l, width = w; }

    void printArea() override { cout << "Area of Rectangle: " << length * width << endl; }

};

class Triangle : protected Shape

{

private:

    float base, height;

public:

    Triangle(float b = 0, float h = 0) { base = b, height = h; }

    void printArea() override { cout << "Area of Triangle: " << 0.5 * base * height << endl; }

};

class Square : protected Shape

{

private:

    float length;

public:

    Square(float l = 0) { length = l; }

    void printArea() override { cout << "Area of Square: " << length * length << endl; }

};

int main()

{

    Rectangle r1(12.5, 4.2);

    Triangle t1(10.2, 4.7);

    Square s1(4.56);

    r1.printArea();

    t1.printArea();

    s1.printArea();

    return 0;

}