Aleksiej's Blog

This video demonstrates the basic capabilities of the Data Entry program.

1. Creating interval numeric and other variables.
2. The verifiable entry of variable values.
3. Exporting to SPSS. Save the template with a password.

                       
                
                
/*

#----------------------------------------------------------------------#
#                                                                      #
#  version 0.0.1                                                       #
#  https://leetcode.com/problems/print-foobar-alternately/submissions/ # 
#                                                                      #
#  Aleksiej Ostrowski, 2020                                            #
#                                                                      #
#  https://aleksiej.com                                                #
#                                                                      #
#----------------------------------------------------------------------#  

*/


#include <iostream>
#include <thread>
#include <mutex>
#include <condition_variable>

std::mutex m;
std::condition_variable cv;

int flag = 1;

void task1(const int n)
{
    int i = 1;

    for(;;) {

        std::unique_lock<std::mutex> lk(m);

        if (flag == 1) { 
           std::cout << "foo";
           i++;
           flag = 2;
           lk.unlock();
           cv.notify_all();
        } else {
           cv.wait(lk, []{return flag == 1;});
        }   

        if (i > n) return;
   }
}

void task2(const int n)
{
    int i = 1;

    for(;;) {

        std::unique_lock<std::mutex> lk(m);

        if (flag == 2) { 
           std::cout << "boo";
           i++;
           flag = 1;
           lk.unlock();
           cv.notify_all();
        } else {
           cv.wait(lk, []{return flag == 2;});
        }   

        if (i > n) return;
   }
}

int main()
{
    flag = 1;

    std::thread t1(task1, 3);
    std::thread t2(task2, 3);

    t1.join();
    t2.join();
}