151: Mainline

In the following program, a box_car object is created, values are assigned to the member variables, and the box_car object's volume is computed by an ordinary function named box_car_volume.

#include   
class box_car { 
  public: double height, width, length; 
}; 
double box_car_volume (double h, double w, double l) { 
  return h * w * l; 
} 
main ( ) { 
  box_car x; 
  x.height = 10.5; x.width = 9.5; x.length = 40.0; 
  cout << "The volume of the box_car is " 
       << box_car_volume (x.height, x.width, x.length) 
       << endl; 
} 
--- Result --- 
The volume of the box_car is 3990