#include <iostream>
#include <vector>

int main()
{
	struct example_structure 
	{
		int thing_one;
		int thing_two;
	};
		
	std::vector<example_structure> data;
	for (int i = 0; i < 3; i++)
	{
		data.push_back({i, i * 2});
	}
	
	for (const auto& x : data)
	{
		std::cout << x.thing_one << " " << x.thing_two << "\n";
	}
}