Simple variadic template example

cpp-variadic-a.cpp

#include <iostream>

using namespace std;

// Support single argument
auto sumElements() {
  return 0;
}

template <typename T, typename... Ts>
T sumElements(T t, Ts... ts) {
  return t + sumElements(ts...);
}

int main() {
  cout << "Example 1: sum elements" << endl;
  cout << "Sum: " << sumElements(4, 5.f, 6L) << endl;
  return 0; 
}