Question

I have a class called BottlingPlant.
I created the following headerfile:

#ifndef __BOTTLINGPLANT_H__
#define __BOTTLINGPLANT_H__

#include <iostream>

class BottlingPlant {
public:
BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments );
void getShipment( unsigned int cargo[ ] );
void action();  
};

#endif

And the following .cc file:

#include <iostream>
#include "PRNG.h"
#include "bottlingplant.h"

BottlingPlant::BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments ) {


}

void BottlingPlant::getShipment( unsigned int cargo[ ] ) {

}

void BottlingPlant::action() {

}

When I try compiling the .cc, it gives me an error in the .cc and .h at the line:

BottlingPlant::BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments )

Saying that there is an expected ) before the & token. This doesn’t make any sense to me as there is no open (. I’m just not sure why it’s giving this error. Printer and NameServer are just separate classes a part of the project but.. do I need to include their header files as well or no?

Any help is greatly appreciated!

Answer 1

You need to include the header files for any classes you’re using, even classes in the same project. The compiler processes each individual source file as a separate translation unit, and it won’t know that a class exists if the header that defines it hasn’t been included in that translation unit.