Sample of threading test

testThread.cpp

#include <iostream>
#include <thread>
#include <chrono>
#include <algorithm>
#include <vector>

#include <cassert>

void thFunc(int start, int end)
{
	for (int i = start;
		i < end;
		i++)
	{
		std::cout << "Hi from thread " << i << std::endl;
	}
}

int main()
{
	auto start = std::chrono::steady_clock::now();


	std::vector<std::thread> workers;
	
	char threadCount = 8;
	int all = 10000;
	int each = all / threadCount;

	for (int i = 0;
		i < threadCount;
		i++)
	{
		int thisTime = 0;
		if ((all - (i + 1)*each) < each)
			thisTime = ((i + 1)*each) + (all - (i + 1)*each);
		else
			thisTime = (i + 1)*each;
		//std::cout << "\nstart: " << i * each << '\n';
		//std::cout << "\nend: " << thisTime << '\n';

		std::thread th(&thFunc, i * each, thisTime);
		workers.push_back(std::move(th));
		assert(!th.joinable());
	}

	//std::cout << "Hi from main!\n" << std::endl;

	std::for_each(workers.begin(), workers.end(), [](std::thread &th)
	{
		assert(th.joinable());
		th.join();
	});

	auto finish = std::chrono::steady_clock::now();
	double elapsed_seconds = std::chrono::duration_cast<std::chrono::duration<double>>(finish - start).count();
	std::cout << "\nTime: " << elapsed_seconds << '\n';
	std::cin.get();

	return 0;
}