[Linker error] undefined reference to `WinMain@16'...

B_Love

Hey! When trying to compile the code for a ordered vector class I get the following error:
[Linker error] undefined reference to `WinMain@16'

Anyone have any idea what I might be doing wrong? I've been through this code multiple times and have no idea what would cause an error like this, I've never seen one like it before. Any help would be greatly appreciated.

The class is supposed to be able to create a sorted list of vectors of type Object. If an object is added to the list it places it in the proper order (ie you want to put in a 5 in the list 2 3 4 6, the 5 would be inserted between the 4 and 6)

Code is as follows:

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 #include <stdlib.h>

#include <iostream>

#ifndef _ORDEREDVECTOR_H

#define _ORDEREDVECTOR_H
 
template <class Object>

class orderedVector

{

    public:

        orderedVector(int n);

        orderedVector( );

        orderedVector(const orderedVector & v);

        virtual ~orderedVector( );

        void dissolve ( );

        void add (const Object x);

        void remove (const Object x);

        void removeAt (int i);

        Object & operator [](int i);

        int length( ) const;

        bool isEmpty( ) const;

        bool contains(const Object x);

    private:

        Object * buffer;

        int size, capacity;

        void reserve(int newCapacity);

        void resize(int newCap) {reserve(newCap);}

    };
 
    template <class Object>

    orderedVector<Object>::orderedVector( ) :size(0),capacity(0),buffer(0){}
 
    template <class Object>

    orderedVector<Object>::orderedVector(int n): size(0), capacity(n), buffer(0) 

    {

        if (n < 0)

        {

            cerr << "Error: You can't create a vector with a negative capacity!\n";

            exit(1);

        }

    }
 
    template <class Object>

    orderedVector<Object>::orderedVector(const orderedVector & v) 

    {

        if (this == &v) 

        {

            cerr << "Error: You can't copy a vector onto itself!\n";

            exit(1);

        }

        buffer = 0;

        buffer = new Object[v.capacity];

        size = v.length( );

        capacity = v.capacity;
 
        for (int i = 0; i < v.length( ); i++) 

        {

            buffer[i] = v.buffer[i];

        }

    }
 
    template <class Object>

    orderedVector<Object>::~orderedVector( ) 

    {

        delete [ ] buffer;

    }
 
    template <class Object>

    void orderedVector<Object>::add(const Object x) 

    {

        if (size == capacity)

                resize(capacity + 5);
 
        if (size == 0)

                buffer[0] = x;

        else 

        {

            for (int i = 0; i < size; i++) 

            {

                if (x <= buffer[i])

                {

                    int j = size;

                    while (j > i) 

                    {

                        buffer[j] = buffer[j-1];

                        j--;

                    }

                    buffer[i] = x;

                }

            }

        }

        size++;

    }
 
    template <class Object>

    void orderedVector<Object>::remove(const Object x) 

    {

        bool temp;

        for (i = 0; i < size; i++) 

        {

            if (buffer[i] == x)

                temp = true;

            else

                temp = false;

        }
 
        if (temp == false) 

        {

            cerr << "Error: Object doesn't exist!\n";

            exit(1);

        }
 
        else 

        {

            for (int i = 0; i < size; i++)

            {

                int j = i;

                while (j < size - 1) 

                {

                    buffer[j] = buffer[j+1];

                    j++;

                }

            }

            size--;    

        }

    }
 
    template <class Object>

    void orderedVector<Object>::removeAt(const int i) 

    {

        if (i < 0 || i >= size) 

        {

             cerr << "Error: Index out of range!\n";

             exit(1);

        }
 
        int j = i;

        while (j < size - 1)

        {

               buffer[j] = buffer[j+1];

            j++;

        }

        size--;

   }
 
   template <class Object>

   Object & orderedVector<Object>::operator [] (int i)

   {

        if (i < 0 || i >= size) 

        {

             cerr << "Error: Index out of range!\n";

             exit(1);

        }

        return buffer[i];

   }
 
   template <class Object>

   int orderedVector<Object>::length( ) const 

   {

       return size;

   }
 
   template <class Object>

   bool orderedVector<Object>::isEmpty( ) const 

   {

       return size == 0;

   }
 
   template <class Object>

   bool orderedVector<Object>::contains(const Object x) 

   {

        bool temp;

        for (i = 0; i < size; i++) 

        {

            if (buffer[i] == x)

                temp = true;

            else

                temp = false;
 
        }

        return temp;

    }
 
    template <class Object>

    void orderedVector<Object>::reserve(int newCap)

    {

        if (buffer == 0)

        {

            size = 0;

            capacity = 0;

        }
 
        if (newCap <= capacity)

                return;
 
        Object * newBuffer = new Object[newCap];
 
        for (int i = 0; i < size; i++)

                newBuffer[i]=buffer[i];
 
        capacity = newCap;

        delete [ ] buffer;

        buffer = newBuffer;    

    }

#endif

Post Reply

SomethingRandom

Howzit going man,

I just saw your post...
I'm very sure you've already figured it out, but if you haven't its probably just that you have specified a int main() funtion in your project.

:)

Cheers,
Nic

Banfa

SomethingRandom is definately on the right lines, however your main may be correct, you have tried to compile/link the project as a Windows Application without defining the WinMain function.

WinMain replaces main as the entry point for Windows Applications so either you were trying to right a Windows application and left out WinMain or you wern't trying to write a Windows application and (hopefully) have a main but have compile/link with flags that tell the compiler/linker that this is a Windows application and probably linked with some of the Windows system libraries.

P.S. The problem has nothing to do with the header file you have posted.

[Linker error] undefined reference to `WinMain@16'...

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