link 的问题

[zhouwei1983426]

求解答
错误:ObjCounter<TestApp>::ObjCounter<TestApp>() 中的 init函数external link error

两个类的头文件 Code如下:
#ifndef OBJ_COUNTER_HH
#define OBJ_COUNTER_HH

template <class T>
class ObjCounter
{
public:
class TooManyObjects
{
};
private:
void init();

protected:
~ObjCounter();
ObjCounter(const ObjCounter&);
ObjCounter();


private:
static int m_iCurNum;
static const int m_iMaxNum;
ObjCounter& operator=(const ObjCounter&);

};
#endif

#ifndef APP_TESTER_HH
#define APP_TESTER_HH
#include "ObjCounter.h"

//class ObjCounter;
class TestApp : private ObjCounter<TestApp>
{
public:
~TestApp(){};
using ObjCounter<TestApp>::TooManyObjects;
static TestApp* CreateTestApp();
static TestApp* CreateTestApp(const TestApp&);

private:
TestApp(){}
TestApp(const TestApp&);
};

#endif

[oN5GrzoN]

啥编译器?error号是多少

[oN5GrzoN]

class TestApp : private ObjCounter<TestApp>

这么厉害?

[zhouwei1983426]

我不太明白我哪里有问题。 想了半天没明白为嘛会有这个link错误。=_=|| AppTester.obj : error LNK2001: unresolved external symbol "protected: __thiscall ObjCounter<class TestApp>::ObjCounter<class TestApp>(void)" (??0?$ObjCounter@VTestApp@@@@IAE@XZ) Debug/test.exe : fatal error LNK1120: 1 unresolved externals