Question

My problem is, I can’t seem to send an object by referance to another class. I have had little luck looking this up on the ‘net. If you could please examine my source and let me know if you have any ideas. TYIA -Roland

I also get these errors

 error: field 'PgmClass' has incomplete type
 error: 'PgmClass' does not name a type
 error: expected ')' before 'thesource'
 error: 'm_hereitis' was not declared in this scope

---

#include <iostream>
#include "pgmclass.h"
#include "inclobj.h"

int main()
{

    char catchcin[256];

    PgmClass wilko;

    wilko.addToSet( 7 );
    wilko.addToSet( 8 );
    wilko.addToSet( 9 );

    InclObj alpha( wilko );

    wilko.addToSet( 10 );
    wilko.addToSet( 11 );

    // This doesn't work
    alpha.eraseOne( 10 );

    // How can I get this to work using referances?

    std::cout << "Program Running." << std::endl;
    std::cin >> catchcin;

    return 0;
}


----------

#include <set>

class PgmClass  {

      public:
    int addToSet( int );
    bool eraseSet( int );
    std::set<int> m_userset;
};

int PgmClass::addToSet( int theint )    {

    m_userset.insert( theint );
}

bool PgmClass::eraseSet( int eraseint )  {

    m_userset.erase( eraseint );
}


----------

class InclObj   {

      public:
    InclObj( PgmClass );
    void eraseOne( int );

    PgmClass m_hereitis;
};

InclObj::InclObj( PgmClass thesource )    {

    m_hereitis = thesource;
}

void InclObj::eraseOne( int findint )    {

    m_hereitis.eraseSet( findint );
}

Answer 1

You need to place your main at the end of the file. (Normaly you add the class in a separate .h file -with the implementation in another .cpp file-, with you include before use the class).
Define, the member as reference:

class InclObj
{

      public:
            InclObj( PgmClass& );
            void eraseOne( int );

            PgmClass& m_hereitis;
};

InclObj::InclObj( PgmClass& thesource ) :  m_hereitis (thesource)
{

}

Doing this you assume some responsibilities. For example, don’t use eraseOne() after the original object has been deleted. Don’t try to add a function like InclObj::use_now_this_other_object(PgmClass& other_source), etc. But I assumed you know about…