#include <iostream>
#include <cmath>               

using namespace std;

class frac
{
   private:
      long num;                
      long den;                
   public:
      frac() : num(0), 
               den(1)  {}

      frac(long d) : num(d),
                     den(1)  {}          
         
      frac(long n,  long d) : num(n),
                              den(d) {}     
      long getnum(void){return num;}
      long getden(void){return den;}
      void fadd( frac f1,  frac f2);
      bool equals( frac f);
      bool notequals( frac f);
      void putfrac();
      void getfrac();
      void lowterms();
};


void frac::fadd(frac f1, frac f2)
   {                                  
   num = f1.num*f2.den + f1.den*f2.num;
   den = f1.den*f2.den;
   lowterms();
   }

bool frac::equals(frac f)       
   {
   return (num==f.num && den==f.den) ? true : false; 
   }

bool frac::notequals(frac f)    
   {
   return (num!=f.num || den!=f.den) ? true : false;
   }

void frac::putfrac()                  
   {
   cout << num << '/' << den;
   }

void frac::getfrac()                
   {
   char dummychar;

   while(1)
      {
      cin >> num;        
      cin >> dummychar;  
      cin >> den;       
      if(den != 0)//......??
         break; 
      cout << "Denominator can't be 0. Try again: ";
      }
   }


void frac::lowterms()    
{
   long tnum, tden, temp, gcd;
   tnum = labs(num);   //......??      
   tden = labs(den);
   
   if( tnum!=0 && tden==0 )  
   { 
      cout << "Division by 0, illegal fraction: "; 
      exit(1); 
   }
   else if( tnum==0 )       
        { 
            num=0; 
            den = 1; //......??
            return; 
        }


   while(tnum != 0)
      {
      if(tnum < tden)        
         { 
            temp=tnum; 
            tnum=tden; 
            tden=temp; 
         } 
      tnum = tnum - tden;  
      }
            gcd = tden;
            num = num / gcd;         
            den = den / gcd;         
}


int main()
{
   frac frarr[100];
   frac total(0, 0), average;
   int count = 0;
   char ch;

       while(true)    
       {
      cout << "\nEnter fraction (0/1 for exit): "  ;  
      frarr[count++].getfrac();

      }while(frarr[count].getnum()==0 && frarr[count].getden()==1);
  
  
   cout << endl;
  system("PAUSE");
   }