#ifndef _FUNCS
#define _FUNCS
#include <fstream>
using namespace std;

class valueFunc {  
 public:
   virtual long long value (void *object) = 0;
   virtual ~valueFunc() { }
};

class displayFunc { 
 public:
   virtual void display (void *object) {}
   virtual ~displayFunc() { }
};

class compareFunc { 
 public:
   virtual int compare (void *obj1, void *obj2) = 0;
   virtual ~compareFunc() { }
};

class hashFunc {
 public:
   virtual int hashfn (void *object) = 0;
   virtual ~hashFunc() { }
};

class createFunc {
 public:
   virtual void *create(fstream&) = 0;
   virtual ~createFunc() { }
};

class readfileFunc {
 public:
   virtual void *read(char*) { return NULL; }
   virtual ~readfileFunc() { }
};
#endif