I need to make fractions to be in the simplest form. how to do it .i know i need to call and pass fraction to gcd and simplify but i dont now how to do it so it will work..

Code:int divide() { int one4,two4,three4,four4; int e4,f4; cout<<"Input the nominator and denominator of a fraction separated by spaces :"<<endl; cin>>one4; cin>>two4; cout<<"Input the nominator and denominator of a fraction separated by spaces :"<<endl; cin>>three4; cin>>four4; cout<<"Input instruction/_" << endl; e4 = one4*four4; f4 = two4*three4; cout<<"("<< one4 << "/"<< two4 <<") / ("<< three4 <<"/"<< four4 <<") = " << e4 << "/" << f4; cout << "\n"; return 0; } void simplify(int x2 , int y2 ,int gcd ) { int a; int b; cout<< "Input the nominator and denomiantor of a fraction separated by spaces :" << x2 <<" "<< y2 << endl; a= x2/gcd; b= y2/gcd; cout<<"This fraction equals ("<< a <<"/"<< b << ")"<< endl; } int gcd(int x2, int y2) { int i; int gcd2; for (i=1; i<=x2; i++) { if((x2%i==0) && (y2%i==0)) gcd2 = i; } return gcd2; } void input() { int x,y,k; cout << "Enter first integer: "; cin >> x; cout << "Enter second integer: "; cin >> y; k=gcd(x,y) ; cout <<"GCD is "<< k << endl; simplify( x , y , k); //calls }