#include <SFML/System.hpp>
#include <iostream>

int main()
{
	int i = 0;
	sf::Thread thread([](int *j) { ++*j; }, &i);
	thread.launch();

	std::cout << i; // This output is a race condition; it's either 0 or 1 depending on how fast the extra thread is executed

	thread.wait();

	std::cout << i;
}