#include <iostream>
#include <string>
 
int get_gcd(int u, int v);
 
int main()
{  
  int u, v;
  int gcd;
 
  u = 280;
  v= 30;
 
  std::cout << "get_gcd result " << "\n";
  gcd = get_gcd(u,v);
  std::cout << "gcd =  " << gcd  << "\n";
 
}
 
int get_gcd(int u, int v)
{
    int t;
    while (u)
    {
         if(u < v)
         {
             t = u; u =v; v = t;
         }
         u = u- v;
    }
    return v;
}