Trouble converting a class to a class TEMPLATE in c++

[gonigkum]

Hi guys,

I am having problems converting a class to a template as the title explains...
I would really appreciate if someone can look up to this code and tell my what is wrong.

#ifndef AnyList_H
#define AnyList_H

#include <iostream>
#include <algorithm>
#include <cstdlib>
using namespace std;

template <class T1, class T2>
class AnyList
{
private:
   T1 *list;                 // Pointer to the array.
   T1 numElements;           // Number of elements.
   T2 isValid(T1 ) const;   // Validates subscripts.
public:
   AnyList(T1 );          // Constructor
   ~AnyList();            // Destructor
   T2 setNumElements(T1 );
   T1 getNumElements() const {	return numElements;	}
   void setElement(T1, T1); // Sets an element to a value
   T1 getElement(T1 ) const; // Returns an element
};




template<class T1, class T2>
AnyList<T1, T2>::AnyList(int size)
{ 
   list = new T1[size];
   numElements = size;
   for (int ndx = 0; ndx < size; ndx++)
      list[ndx] = 0;
}


template<class T1, class T2>
AnyList<T1, T2>::~AnyList()
{ 
   delete [] list;
}



template<class T1, class T2>
bool AnyList<T1, T2>::isValid(int element) const
{
   T2 status;

   if (element < 0 || element >= numElements)
      status = false;
   else
      status = true;
   return status;
}


template<class T1, class T2>
void AnyList<T1, T2>::setElement(int element, int value)
{
   if (isValid(element))
      list[element] = value;
   else
   if(setNumElements(element))
   {
	   T1 *copyArray = new T1[element]; // allocate a new array on the heap
	   
	   // copy the old array to the new allocated array
	   for(int i = 0; i < numElements; i++)
	   {
		   copyArray[i] = list[i];
	   }
	   
	   // delete the array where 'list' was pointing to
	   delete [] list;
	   
	   // set the other elements to 0
	   for(int j = numElements; j < element - 1; j++)
	   {
		   copyArray[j] = 0;
	   }
	   
	   // set the last element to the 'value' passed to setNumbers
	   copyArray[element-1] = value; 
	   
	   // make 'list' point to the new, completed array
	   list = copyArray;
		
   }
   else
   {
      cout << "Error: Invalid subscript\n";
      exit(EXIT_FAILURE);
   }
}


template<class T1, class T2>
int AnyList<T1, T2>::getElement(int element) const
{
   if (isValid(element))
      return list[element];
   else
   {
      cout << "Error: Invalid subscript\n";
      exit(EXIT_FAILURE);
   }
}

template <T1, T2>
bool AnyList<T1, T2>::setNumElements(int x)
{
	if( x <= numElements )
		return false;
	else
	{
		return true;
	}
}
#endif 

And this is the application file:

// This program demonstrates the IntegerList class.
#include <iostream>
#include "AnyList.h"
using namespace std;

int main()
{
   const int SIZE = 20;
   AnyList<int , bool> numbers(SIZE);
   int val, x;

   // Store 9s in the list and display an asterisk 
   // each time a 9 is successfully stored.
   for (x = 1; x <= SIZE; x++)
   {
      numbers.setElement(x-1, 9);
      cout << "* ";
   }
   cout << endl;


   // Display the 9s.
   for (x = 1; x <= SIZE; x++)
   {
      val = numbers.getElement(x-1);
      cout << val << " ";
   }
   cout << endl;

   // Attempt to store a value outside the list's bounds.
   numbers.setElement(50, 9);


  
   // Will this message display?
   cout << "Element 50 successfully set.\n";
   return 0;
}

Thanks so much for taking a look at this.

[ne555]

tell my what is wrong.

It does not compile.
http://www.cplusplus.com/forum/articles/40071/#msg218019

[gonigkum]

I get the following errors:

Pr13-15.obj : error LNK2019: unresolved external symbol "public: __thiscall AnyList::~AnyList(void)" (??1?$AnyList@H_N@@QAE@XZ) referenced in function _main
Pr13-15.obj : error LNK2019: unresolved external symbol "public: int __thiscall AnyList::getElement(int)const " (?getElement@?$AnyList@H_N@@QBEHH@Z) referenced in function _main
Pr13-15.obj : error LNK2019: unresolved external symbol "public: void __thiscall AnyList::setElement(int,int)" (?setElement@?$AnyList@H_N@@QAEXHH@Z) referenced in function _main
Pr13-15.obj : error LNK2019: unresolved external symbol "public: __thiscall AnyList::AnyList(int)" (??0?$AnyList@H_N@@QAE@H@Z) referenced in function _main

I've tried many things but this seems to be an error in the method calls from the main program(ie application file).

Thanks

[ne555]

template <class T1, class T2>
class AnyList
{ 
//...
   AnyList(T1 );// Constructor
}; 

template<class T1, class T2>
AnyList<T1, T2>::AnyList(int size) //the prototype does not match 

It should be template<class T1,classT2> AnyList<T1, T2>::AnyList(T1 size)
However, does that makes sense?

[gonigkum]

Actually I have matched the prototypes correctly so the version of the AnyList class in this thread is older. However, I am still receiving the same errors. I am unsure whether it is the calls from the main program that are causing the errors or it is just the prototypes that are not matching somehow :(
Should I post the updated class ?
Thanks

[gonigkum]

NVM it is working now. There was a mistake on the file linking process.
Thanks