Thread: Unresloved Externals.....

is there trulyanything else in the world more evil?

you code for hours to find out YES! it compiles then, like a ton of bricks it hits you........unresolved eternals....


ARRGHHHHHHH

ok now that thats out

here is my code. it is in 3 linked source files


here is the header followed by the class definition, then the actual
program itself. any help is greatly appreciated.

Code:

#ifndef BUB_H
#define BUB_H

class sort
{
public:
sort();
~sort();
void bubble( int [], const int, bool (*)( int, int ) );
void swap(int * const, int * const);


};




#endif

// now the function list

#include <iostream>
using namespace std;

#include "BUB.H"


sort::sort()
{}

sort::~sort()
{}
void sort::bubble( int work[], const int size, 
             bool (*compare)( int, int ) )
{
   void swap( int * const, int * const );   

   for ( int pass = 1; pass < size; pass++ )

      for ( int count = 0; count < size - 1; count++ )

         if ( (*compare)( work[ count ], work[ count + 1 ] ) )
            swap( &work[ count ], &work[ count + 1 ] );
}



 void sort::swap(int * const element1Ptr, int * const element2Ptr )
{
   int temp;

   temp = *element1Ptr;
   *element1Ptr = *element2Ptr;
   *element2Ptr = temp;
}


bool ascending( int a, int b )
{
   return b < a;   
}

bool descending( int a, int b )
{
   return b > a;   
}

// and the actual running program

#include <iostream>
using namespace std;

#include <iomanip>

using std::setw;

#include "BUB.H"

bool ascending( int, int );
bool descending( int, int );

int main()
{
   
   sort b;
   
	
	
   const int arraySize = 10;
   int order, 
       counter,
       a[ arraySize ] = { 2, 6, 4, 8, 10, 12, 89, 68, 45, 37 };

   cout << "Enter 1 to sort in ascending order,\n" 
        << "Enter 2 to sort in descending order: ";
   cin >> order;
   cout << "\nData items in original order\n";
   
   for ( counter = 0; counter < arraySize; counter++ )
      cout << setw( 4 ) << a[ counter ];

   if ( order == 1 ) {
     b.bubble( a, arraySize, ascending);
      cout << "\nData items in ascending order\n";
   }
   else {
      b.bubble( a, arraySize, descending);
      cout << "\nData items in descending order\n";
   }

   for ( counter = 0; counter < arraySize; counter++ )
      cout << setw( 4 ) << a[ counter ];

   cout << endl;
   
   



return 0;


}

geez sorry here she is


[CODE]

--------------------Configuration: bub - Win32 Debug--------------------
Linking...
bubM.obj : error LNK2001: unresolved external symbol "void __cdecl swap(int * const,int * const)" (?swap@@YAXQAH0@Z)
Debug/bub.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

bub.exe - 2 error(s), 0 warning(s)
[\CODE]