. Multiple Inheritance Example.

 

#include <iostream>

using namespace std;

class Area

{

    public:

    float area_calc(float l,float b)

    {

        return l*b;

    }

};

class Perimeter

{

    public:

    float peri_calc(float l,float b)

    {

        return 2*(l+b);

    }

};

//Rectangle class is derived from classes Area and Perimeter.

class Rectangle : private Area, private Perimeter

{

    private:

    float length, breadth;

    public:

    Rectangle() : length(0.0), breadth(0.0) { }

    void get_data( )

    {

        cout<<"Enter length: ";

        cin>>length;

        cout<<"Enter breadth: ";

        cin>>breadth;

    }

    float area_calc()

    {

        //Calls area_calc() of class Area and returns it.

        return Area::area_calc(length,breadth);

    }

    float peri_calc()

    {

        //Calls peri_calc() function of class Perimeter and returns it.

        return Perimeter::peri_calc(length,breadth);

    }

};

int main()

{

    Rectangle r;

    r.get_data();

    cout<<"\n\n";

    cout<<"Area = "<<r.area_calc();

    cout<<"\nPerimeter = "<<r.peri_calc();

    return 0;

}