ATL / WTL / STL

TestProject.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall CMyTemplate<int>::Method1(int)" (?Method1@?$CMyTemplate@H@@UAEXH@Z)

#include <iostream>

using namespace std;


template <class T> 
class CMyTemplate
{
public:
	virtual void Method1(T& TDummy);
};

template <class T>
void CMyTemplate<T>::Method1(T& TDummy)
{
	TDummy = TDummy + 1;
}

int wmain()
{
	int					zz = 25;
	CMyTemplate<int>	objT;
	objT.Method1(zz);
	wcout << L"Value of the dummy: " << zz << endl;

	return 0;
}

Could anyone please tell me, is there any way to separate the definition of the methods of a template class ,from header file to .cpp file.

template <class T>
void CMyTemplate<T>::Method1(T& TDummy)
{
	TDummy = TDummy + 1;
}

template <class T> 
class CMyTemplate
{
public:
	virtual void Method1(T& TDummy);
};

-------------------------------------
-- In my_template.h file
...
template <typename T>
T my_temp_func(const T& t);

-------------------------------------
-- In my_template.cpp file

#include "my_template.h"

// Definition
template <typename T>
T my_temp_func(const T& t)
{
  return t;
}

// Instantiation declaration
int my_temp_func<int>(const int& t);

-------------------------------------
-- In using_my_template.cpp
#include "my_template.h"
...
int i = my_temp_func<int>(4); // works
string s = my_temp_func<string>("Abob"); // link error

void showtime(void *dummy) {
	computing = true;
	output.clear();
	// Display the copyright
	output = _TEXT("Fibonacci 3.0.0 for Windows");
	output += ToString("/n/l/n/l");
	// f << name << ": " << time << " seconds" << std::endl << std::endl;
	output += _TEXT("(c) 2010-1 583727 BC Ltd, All Rights Reserved.");
	// f << name << ": " << time << " seconds" << std::endl << std::endl;
	output += _TEXT("/n/l");
	output += _TEXT("Free for peronsal use only");
	output += _TEXT("/n/l/n/l");
	output += _TEXT("Commercial and government use requires a license");
	output += _TEXT("/n/l/n/l");
	output += _TEXT("To acheieve consistant results, run this program in the clean boot mode");
	output += _TEXT("/n/l");
	output += _TEXT("Click on start, in the seach box enter 'msconfig' and choose the startup tab, disable everyting and reboot");
	output += _TEXT("/n/l/n/l");
	output += _TEXT("RAM Performance  ");
	output += ToString(benchmark(fib2));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Scalar Performance  ");
	output += ToString(benchmark(fib3));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("CPU Large Multiplication Performance  ");
	output += ToString(benchmark(fib4));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	v.resize(0); t.resize(0);  // free up some RAM
	output += _TEXT("Recursive Factorial Performance  ");
	output += ToString(benchmark(RunFact));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Bubble Sort Performance  ");
	output += ToString(benchmark(RunBubbleSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Insertion Sort Performance  ");
	output += ToString(benchmark(RunInsertionSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Shell Sort Performance  ");
	output += ToString(benchmark(RunShellSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Quick Sort Performance  ");
	output += ToString(benchmark(RunQuickSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Merge Sort Performance  ");
	output += ToString(benchmark(RunMergeSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Heap Sort Performance  ");
	output += ToString(benchmark(RunHeapSort));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel Bitwise Sieve of Eratosthenes Performance  ");
	output += ToString(benchmark(sieve));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel Goldbach Conjecture Performance Performance  ");
	output += ToString(benchmark(goldbach));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel Collatz Conjecture Performance  ");
	output += ToString(benchmark(RunCollatz));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel vector<float> normalization  ");
	output += ToString(benchmark(vtestfloat));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel vector<double> normalization  ");
	output += ToString(benchmark(vtestdouble));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel vector<std::complex> normalization  ");
	output += ToString(benchmark(vtestcomplex));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel matrix<float> multiplication  ");
	output += ToString(benchmark(mtest1));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel matrix<double> multiplication  ");
	output += ToString(benchmark(mtest2));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l");
	output += _TEXT("Parallel matrix<std::complex> multiplication  ");
	output += ToString(benchmark(mtest3));
	output += _TEXT(" seconds");
	output += _TEXT("/n/l/n/l");
	//
	// Completed so advise the user
	//
	computing = false;
	MessageBox(NULL, L"Completed", L"Fibonacci", MB_OK);
	//_endthread();
}

VeganFanatic wrote:

do I need to use the exitthread anywhere?

hrishi321 wrote:

I have many classes already in my VC++ project, which were build on MFC. Meaning
the data types were MFC based. like CByteArray, CString etc etc. Now I need to
avoid the uses of MFC data types , and introduce STL data types.