93: Mainline

In the example shown in the previous segment, the arguments are all constant expressions, but, of course, arguments can be variable expressions, such as height, width, and length, or expressions containing operators, such as length + stretch:

#include 
// Definition of box_car_volume function will go here
main ( ) {
  int height = 11, width = 9, length = 40, stretch = 10;
  cout << "The volume of the standard box car is "
       << box_car_volume (height, width, length)            
       << endl
       << "The volume of a stretched box car is "
       << box_car_volume (height, width, length + stretch)  
       << endl; 
}