Thread: Can someone see why this is crashing at runtime?

Sorry my description is not a bit more detailed, but I just haven't got a clue why this is crashing. I am a complete newb (I"m just teaching myself), so hopefully one of you more experienced guys will spot the problem quickly.

The crash is occurring in the overloaded << operator function contained within road.cpp. The crash is occurring when I try and cout the variable rCar (if I comment that bit out, it doesn't crash).

Hopefully the code is fairly self-explanatory. Obviously it's nothing useful, just me trying to get my head around the language.

Thanks in advance.


main.cpp

Code:

#include <iostream>
#include "car.h"
#include "road.h"


using namespace std;


int main()
{	
	Car c(1962, "EK", "Holden");
	cout << c << endl;
	
	Road r("Maitland");	
	cout << r << endl;
	
	cout << "Adding the car..." << endl;
	
	r.add(&c);
	cout << r << endl; 
}

car.h

Code:

#ifndef CAR_H
#define CAR_H
#include <string>
#include <ostream>


using namespace std;


class Car
{
	public:
		const short m_nYear;
		const string m_strModel;
		const string m_strMake;		
		Car(short, string, string);
		friend ostream& operator <<( ostream&, Car c );


	private:


	protected:


};


#endif // CAR_H

car.cpp

Code:

#include "car.h"
#include <iostream>


using namespace std;




Car::Car(short year, string model, string make) : m_nYear(year), m_strModel(model), m_strMake(make)
{	
	cout << "Car constructed: " << (*this) << "." << endl;
}


ostream& operator <<( ostream& outputStream, Car c )
{
	outputStream << c.m_nYear << " " << c.m_strModel << " " << c.m_strMake;
	return outputStream;
}

road.h

Code:

#ifndef ROAD_H
#define ROAD_H
#include "car.h"
#include <iostream>
#include <ostream>


using namespace std;


class Road
{
public:
	Road( string );
	~Road();
	const string m_strName;
	friend ostream& operator <<(ostream&, Road);
	void add(Car* c);
	
private:
	Car* m_pcCar;


};


#endif // ROAD_H

Code:

#include "road.h"
#include "car.h"
#include <iostream>


using namespace std;


Road::Road(string name) : m_strName(name)
{
	cout << (*this) << " was created." << endl;
}


Road::~Road()
{
}




void Road::add(Car* pCar)
{
	this->m_pcCar = pCar;	
}




ostream& operator <<( ostream& outputStream, Road r )
{
	Car& rCar = *(r.m_pcCar);
	
	if (r.m_pcCar)
		outputStream << r.m_strName << " road, featuring a " << rCar; // <-- causes CRASH!!!
	else 
		outputStream << r.m_strName << " road";
	return outputStream;
}