#include<iostream>
using namespace std;

class Fraction {
  private:
      int numerator;
      int denominator;

  public:
    Fraction(int numerator,int denominator){
        this->numerator = numerator;
        this->denominator = denominator;   /// mandatory
    }
    void print(){
      cout<<numerator<<"/"<<denominator<<endl; /// optional
    }
    void add(Fraction f2){
       int lcm = denominator * f2.denominator;  /// optional
       int x = lcm/this->denominator;   /// optional
       int y = lcm/f2.denominator;
       int num = x*numerator + y*f2.numerator;

       /// store result in f1
       this->numerator = num;   /// optional
       this->denominator = lcm;

       simplify();
    }
    void simplify(){
       int gcd = 1;
       int j = min(this->numerator,this->denominator);  /// optional
       for(int i=1;i<=j;i++){
        if(numerator%i==0 && denominator%i==0){
            gcd = i;
        }
       }
       
     /// inbuilt function for gcd   =    __gcd(a,b);
     /// int c = __gcd(a,b);  
    /// simplify
    numerator = numerator/gcd;
    denominator = denominator/gcd;
    }

};

int main(){
   Fraction f1(10,2);
   Fraction f2(15,4);

   f1.add(f2);
   f1.print();
   f2.print();
   return 0;
}