#include <iostream.h> 
// Define display_box_car_volume first:
void display_box_car_volume (int h, int w, int l) {
  cout << "The volume of the box car is " << h * w * l << endl;
  return;  ///
}
// Then, define main:
main ( ) {
  int height = 11, width = 9, length = 40;
  display_box_car_volume (height, width, length);
}