#include <iostream>

 template<typename T>
 T gcd(T a, T b){
   if( b == 0 ){ return a; }
   else{
     return gcd(b, a % b);
   }
 }

 int main(){

   std::cout << std::endl;

   std::cout << "gcd(100,10)= " << gcd(100,10)  << std::endl;
   std::cout << "gcd(100,33)= " << gcd(100,33) << std::endl;
   std::cout << "gcd(100,0)= " << gcd(100,0)  << std::endl;

   /*

   std::cout << gcd(3.5,4.0)<< std::endl;
   std::cout << gcd("100","10") << std::endl;

   std::cout << gcd(100,10L) << gcd(100,10L) << std::endl;

   */

   std::cout << std::endl;

 }