Using our new class

float cylinder::GetVolume(){

return ( PI*radius*radius * height );

}

float cylinder::GetSurface() {

return ( 2*PI*radius*height + 2*PI*radius*radius);

}

cylinder::cylinder(float r, float h){

radius = r;

height = h;

}

class cylinder {

protected:

float radius;

float height;

public:

float GetVolume();

float GetSurface();

cylinder (float,float);

};

#include <iostream.h>

main()

{

float volume;

cylinder c( 2. , 1. );

volume = c.GetVolume();

cout << "volume is " << volume << endl;

}

Here we construct a new cylinder with radius 2 and height 1.

Then we ask the cylinder to please calculate its volume and return it to us

BTW, the output is: volume is 12.5664