# größten gemeinsamen Teile zweier Zahlen berechnen
 #include <iostream>

 constexpr auto gcd(int a, int b){
   while (b != 0){
     auto t = b;
     b = a % b;
     a = t;
   }
   return a;
 }

 int main(){

   std::cout << std::endl;

   constexpr auto i= gcd(11, 121);
   std::cout << i << std::endl;
   std::cout << 11 << std::endl;

   auto fir= 11;
   auto sec= 121;
   auto j= gcd(11, 121);
   std::cout << j << std::endl;

   std::cout << std::endl;

 }