Checking some OpenMP code

openmp_sections.cpp

// Compile with: g++ -fopenmp /tmp/lol.cpp && ./a.out
// Set number of threads: export OMP_NUM_THREADS=16
// Expected behaviour: should print a = 1, b = 2 and only two different threads should launch

#include <iostream>
#include <omp.h>

using namespace std;

int main() {
    int a = 0, b = 0;
    #pragma omp parallel sections
    {
        #pragma omp section
        {
            cout << "1st section TID: " << omp_get_thread_num() << endl;
            a = 1;
        }

        #pragma omp section
        {
            cout << "2nd section TID: " << omp_get_thread_num() << endl;
            b = 2;
        }
    }
    cout << "a = " << a << ", b = " << b << endl;

    return 0;
}