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class FncPtrBase {
	public:
	virtual ~FncPtrBase() {}
	virtual int 	Get()=0;
	virtual float Get()=0;
	virtual int 	Set(int)=0;
	virtual float Set(float)=0;
	}
// class template for actual data entries
template<class U,typename V>
class FncPtr    {
    V CallGet()     {return (U.*Get)();}
    V CallSet(V x)  {return (U.*Set)(x);}
};
template<class U,typename V>
class FncPtr:FncPtrBase {
    U& Cls;    // Reference to object that function will be called on
    V (U::*Get)();    // Member function pointers
    V (U::*Set)(V);
	public:
		FncPtr(U& cls,V (U::*get)(), V (U::*set)(V)):Cls(cls),Get(get),Set(set);
		int 	Get()				{}
		float Get()				{}
		int 	Set(int i)	{}
		float Set(float f){}
}
//***  Class Specializations *********
template<class U>
class FncPtr:FncPtrBase {
    U& Cls;    // Reference to object that function will be called on
    float (U::*Get)();    // Member function pointers
    float (U::*Set)(float);
	public:
		FncPtr(U& cls,float (U::*get)(), float (U::*set)(float))
			:Cls(cls),Get(get),Set(set);
		int 	Get()					{}
		float Get()					{U.*Get();}
		int 	Set(int i)			{}
		float Set(float f)	{U.*Set(f);}
}
template<class U>
class FncPtr:FncPtrBase {
    U& Cls;    // Reference to object that function will be called on
    int (U::*Get)();    // Member function pointers
    int (U::*Set)(int);
	public:
		FncPtr(U& cls,int (U::*get)(), int (U::*set)(int))
			:Cls(cls),Get(get),Set(set);
		int 	Get()					{U.*Get();}
		float Get()					{}
		int 	Set(int i)		{U.*Set(i);}
		float Set(float f)	{}
}

prog.cpp:5:16: error: ‘virtual float FncPtrBase::Get()’ cannot be overloaded with ‘virtual int FncPtrBase::Get()’
  virtual float Get()=0;
                ^~~
prog.cpp:4:15: note: previous declaration ‘virtual int FncPtrBase::Get()’
  virtual int  Get()=0;
               ^~~
prog.cpp:8:3: error: expected ‘;’ after class definition
  }
   ^
   ;
prog.cpp: In member function ‘V FncPtr<U, V>::CallGet()’:
prog.cpp:12:31: error: expected primary-expression before ‘.*’ token
     V CallGet()     {return (U.*Get)();}
                               ^~
prog.cpp:12:33: error: ‘Get’ was not declared in this scope
     V CallGet()     {return (U.*Get)();}
                                 ^~~
prog.cpp: In member function ‘V FncPtr<U, V>::CallSet(V)’:
prog.cpp:13:31: error: expected primary-expression before ‘.*’ token
     V CallSet(V x)  {return (U.*Set)(x);}
                               ^~
prog.cpp:13:33: error: ‘Set’ was not declared in this scope
     V CallSet(V x)  {return (U.*Set)(x);}
                                 ^~~
prog.cpp: At global scope:
prog.cpp:16:7: error: redefinition of ‘class FncPtr<U, V>’
 class FncPtr:FncPtrBase {
       ^~~~~~
prog.cpp:11:7: note: previous definition of ‘class FncPtr<U, V>’
 class FncPtr    {
       ^~~~~~
prog.cpp:42:7: error: redeclared with 1 template parameter
 class FncPtr:FncPtrBase {
       ^~~~~~
prog.cpp:11:7: note: previous declaration ‘template<class U, class V> class FncPtr’ used 2 template parameters
 class FncPtr    {
       ^~~~~~

Standard output is empty