addvolumfrendfunc.cpp

#include <iostream>
#include <String>
using namespace std;
class Cuboid;
class Sphere
{
private:
 int radius;
 double volume;

public:
 void Acceptdata()
 {
 cout << "Enter the radius:";
 cin >> radius;
 }
 void CalculateVolume()
 {
 volume = 4 / 3.0 * 3.14 * radius * radius * radius;
 }
 void Display()
 {
 cout << "The volume of Sphere is :" << volume << endl;
 }
 friend void AddVolume(Sphere sph, Cuboid cbd);
};

class Cuboid
{
private:
 int length, breadth, height;
 double volume;

public:
 void AcceptData()
 {
 cout << "Enter the length:";
 cin >> length;
 cout << "Enter the breadth:";
 cin >> breadth;
 cout << "Enter the height:";
 cin >> height;
 }
 void CalculateVolume()
 {
 volume = length * breadth * height;
 }
 void Display()
 {
 cout << "The volume of Sphere is:" << volume << endl;
 }
};