编译没问题，链接出了问题，想请教各位哪出了问题

flyingbird123

//Compare.h
template <class numtype>
class Compare 
{
  public :
          Compare(numtype a,numtype b);
          numtype max ();
      numtype min ();
  private :
          numtype x,y;
};
//Compare.cpp
# include <iostream>
# include "Compare.h"
template <class numtype>
numtype Compare <numtype>::max ()
{
        return (x>y)?x:y;
}
template <class numtype>
numtype Compare <numtype>::min ()
{
        return (x<y)?x:y;
}
// main.cpp
# include <iostream>
# include "Compare.h"
using namespace std;
int main()
{
 Compare <int>cmp1(3,7);
 cout<<cmp1.max()<<" is the maximum of two integer numbers ."<<endl;
 cout <<cmp1.min()<<" is the minimum of two integer numbers ."<<endl;


 Compare <float> cmp2(45.78,93.6);
 cout <<cmp2.max()<<" is the maximum of two integer numbers ."<<endl;
 cout <<cmp2.min()<<" is the minimum of two integer numbers ."<<endl;


 Compare <char>cmp3 ('a','A');
 cout <<cmp3.max()<<" is the maximum of two characteres ."<<endl;
 cout <<cmp3.min()<<" is the minimum of two characteres ."<<endl;
 return 0;
}

flyingbird123

有没有人会啊，教教我吧，搞不懂哪错了，链接显示类似以下错误
main.obj : error LNK2001: unresolved external symbol "public: char __thiscall Compare<char>::min(char,char)" (?min@?$Compare@D@@QAEDDD@Z)