Help figuring out error

I keep getting this error when I compile:

Code:

In function 'std::ostream& operator<<(std::ostream&, User&)':
error: no match for 'operator<<' in 'os << u->User::userID'
note: candidates are: std::ostream& operator<<(std::ostream&, User&)

And here's the operator

Code:

friend std::ostream& operator<<( std::ostream& os, User& u ){
		os << u.userID << " " << u.name << " " << u.systemKey << " " << u.accessKey;
		return os;
	}

I'm not even calling the "<<" operator anywhere in my code. My code only creates three users, that's it. I can't get past compile.

Any help is most appreciated!

????

What is u.userID? An int of some kind? You'll have to give more of an example.

Here's my code so far.

users.h

Code:

#ifndef USERS_H_
#define USERS_H_

#include <string>

typedef unsigned char uchar;
typedef unsigned int uint;

class User{
	
	public:
		User( uint id, std::string name );
		virtual ~User(){};
		const uchar& checkSystemKey() const;
		const uchar& checkAccessKey() const;
		void setSystemKey( uchar& system );
		void setAccessKey( uchar& access );
		
	friend std::ostream& operator<<( std::ostream& os, User& u ){
		os << u.userID << " " << u.name << " " << u.systemKey << " " << u.accessKey;
		return os;
	}

	protected:
		User( const User& );
		User& operator=( const User& );
		uint userID;
		std::string name;
		uchar systemKey;
		uchar accessKey;
};

class SysAdmin : public User{

	public:
		SysAdmin( uint id, std::string name, uchar system );
		virtual ~SysAdmin(){};
		void addSystemUser( User& user );
		void setUserAccess( User& user, uchar& access );
		
	private:
		uchar mySystemKey;
};

class SiteAdmin : public SysAdmin{

	public:
		SiteAdmin( uint id, std::string name, uchar system );
		User* createBasicUser( uint id, std::string name );
		User* createSysAdmin( uint id, std::string name, uchar system );
};

#endif

users.cpp

Code:

#include "users.h"

User::User( uint id, std::string name )
: userID( id ), name( name ), systemKey( 0x00 ), accessKey( 0x00 ) {}

inline const uchar& User::checkSystemKey() const{
	return systemKey;
}

inline const uchar& User::checkAccessKey() const{
	return accessKey;
}

inline void User::setSystemKey( uchar& system ){
	systemKey = systemKey | system;
}

inline void User::setAccessKey( uchar& access ){
	accessKey = accessKey | access;
}

SysAdmin::SysAdmin( uint id, std::string name, uchar system )
: User( id, name ), mySystemKey( system ) {}

inline void SysAdmin::addSystemUser( User& user ){
	user.setSystemKey( mySystemKey );
}

inline void SysAdmin::setUserAccess( User& user, uchar& access ){
	user.setAccessKey( access );
}

SiteAdmin::SiteAdmin( uint id, std::string name, uchar system )
: SysAdmin( id, name, system ) {}

User* SiteAdmin::createBasicUser( uint id, std::string name ){
	return new User( id, name );
}

User* SiteAdmin::createSysAdmin( uint id, std::string name, uchar system ){
	return new SysAdmin( id, name, system );
}

main.cpp

Code:

#include <iostream>
#include <string>

#include "users.h"

int main(){

	SiteAdmin Chris( 1, "Chris", 0x80 );
	User* Eric = Chris.createBasicUser( 2, "Eric" );
	User* Mike = Chris.createSysAdmin( 3, "Mike", 0x40 );
	
	return 0;
}

So when compiling users.cpp, where oh where is #include <iostream>?

ah, that worked.