Создать класс Pair(пара чисел) и класс-наследник Fraction

#include "StdAfx.h"
#include <iostream>
 
class pair       
{
protected:
    int first; 
    int second;
   
public:
    void set_first(int t){first=t;};///
    void set_second(int t){second=t;};///7
    int get_first(){return first;};
    int get_second(){return second;};
    pair(int ta=0, int tb=0):first(ta), second(tb){};
    virtual friend bool operator > (pair, pair);//тут скорее всего нужен virtual. Гуру, отзовитесь если да
};
bool operator > (pair p1, pair p2){
    return (p1.first>p2.first)?(true):(  (p1.first==p2.first)?(p1.second>p2.second):(false)  );
}
 
 
////////////////////////////////////////////////
class fraction: public pair //класс  дробь
{
private:
    
public:
    void set_second(int t){if (t!=0) second=t;};///только потому что делить на 0 нельзя,  а вообще гетсеттеры ЗЛО
    friend bool operator > (fraction, fraction);
 
};
bool operator > (fraction f1, fraction f2){
    return (f1.second*f2.second>0)?(f1.first*f2.second>f2.first*f1.second):(f1.first*f2.second<f2.first*f1.second);
}
//////////////////////////////////////////////////
int main ()
{
   
    return 0;  //
}

virtual friend bool operator > (pair, pair);

friend bool operator > (pair, pair);

return (f1.second*f2.second>0)?(f1.first*f2.second>f2.first*f1.second):(f1.first*f2.second<f2.first*f1.second);

virtual friend bool operator > (pair, pair);

#include "conio.h"
#include <iostream>
 
class pair       
{
protected:
    int first; 
    int second;
   
public:
    void set_first(int t){first=t;};
    void set_second(int t){second=t;};
    int get_first(){return first;};
    int get_second(){return second;};
    pair(int ta=0, int tb=0):first(ta), second(tb){};
    friend bool operator > (pair, pair);
};
bool operator > (pair p1, pair p2){
    return (p1.first>p2.first)?(true):(  (p1.first==p2.first)?(p1.second>p2.second):(false)  );
}
 
 
 
class fraction: public pair 
{
private:
    
public:
    void set_second(int t){if (t!=0) second=t;};
    friend bool operator > (fraction, fraction);
 
};
bool operator > (fraction f1, fraction f2){
    return (f1.second*f2.second>0)?(f1.first*f2.second>f2.first*f1.second):(f1.first*f2.second<f2.first*f1.second);
}
 
int main ()
{
  getch();
    return 0;
  
    
}

int main (){
  fraction f1(2, 3);
  fraction f2(1, 2);
  
  std::cout<<"("<<f1.get_first()<<"/"<<f1.get_second()<<") + ("<<f1.get_first()<<"/"<<f1.get_second();
  f1=f1+f2;
 std::cout<<") = ("<<f1.get_first()<<"/"<<f1.get_second()<<") "<<std::endl;
  getch();
    return 0;    
}

 fraction f1(2, 3);

fraction(const int& f, const int& s): pair(f, s)
{
 
}

#include "conio.h"
#include <iostream>
 
class pair       
{
protected:
    int first; 
    int second;
   
public:
    void set_first(int t){first=t;};
    void set_second(int t){second=t;};
    int get_first(){return first;};
    int get_second(){return second;};
    pair(int ta=0, int tb=0):first(ta), second(tb){};
    friend bool operator > (pair, pair);
 
};
bool operator > (pair p1, pair p2){
    return (p1.first>p2.first)?(true):(  (p1.first==p2.first)?(p1.second>p2.second):(false)  );
}
 
 
 
class fraction: public pair 
{
private:
    
public:
    void set_second(int t){if (t!=0) second=t;};
    friend bool operator > (fraction, fraction);
   fraction(const int& f, const int& s): pair(f, s)
{
 
}
 
 
};
bool operator > (fraction f1, fraction f2){
    return (f1.second*f2.second>0)?(f1.first*f2.second>f2.first*f1.second):(f1.first*f2.second<f2.first*f1.second);
}
 
int main (){
 
  fraction f1(2, 3);
  fraction f2(1, 2);
  
  std::cout<<"("<<f1.get_first()<<"/"<<f1.get_second()<<") + ("<<f1.get_first()<<"/"<<f1.get_second();
  f1=f1+f2;
 std::cout<<") = ("<<f1.get_first()<<"/"<<f1.get_second()<<") "<<std::endl;
  getch();
    return 0;    
}

const fraction operator+ (const fraction& f) const
{
    return fraction(first + f.first, second + f.second);
}