#include <pthread.h>
#include <unistd.h>

#include <string>
#include <iostream>

using namespace std;

bool gDone = false;


int f(int x)
{
    int r = x * 4;
    return r - 3;
}

void* mainLoop(void* arg)
{
    while (!gDone)
    {
        sleep(5);
        cout << "MARK: five seconds" << endl;
    }
    return NULL;
}



int main(int argc, char* argv[])
{
    pthread_t        myThread;
    pthread_attr_t   attr;
    pthread_attr_init(&attr);
    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
    
    pthread_create(&myThread, &attr, mainLoop, NULL);
    pthread_attr_destroy(&attr);
    
    
    std::string a = "this is my string";

    cout << "string [" << a.size() << "]: " << a << endl;

    for (int i = 1; i < 10; ++i)
        cout << "f(" << i << "): " << f(i) << endl;

    cin >> a;

    gDone = true;

    pthread_join(myThread, NULL);
    
    return 0;
}