#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;  ///
}                                                                ///
// Then, define main:
main ( ) {
  int height = 11, width = 9, length = 40;
  display_box_car_volume (height, width, length);
}