initializer_list 
  1. #include <iostream>
  2. #include <initializer_list>
  3.  
  4. int main(int argc, char *argv[])
  5. {
  6. 	//initialization
  7. 	std::initializer_list<int> l;
  8. 	l = {10, 20, 30, 40};
  9.  
  10. 	//size
  11. 	std::cout<<"Size: "<<l.size()<<std::endl;
  12.  
  13. 	//access elements
  14. 	for(auto e : l)
  15. 		std::cout<<e<<" ";
  16. 	std::cout<<std::endl;
  17.  
  18. 	for(auto it = l.begin(); it != l.end(); ++it)
  19. 		std::cout<<*it<<" ";
  20. 	std::cout<<std::endl;
  21.  
  22. 	return 0;
  23. }
  24.
Reference