[user@computer dir]$ gcc pp_omp_ex3.c -o pp_omp_ex3
[user@computer dir]$ ./pp_omp_ex3
Doing some stuff in thread 0
[user@computer dir]$ gcc -fopenmp pp_omp_ex3.c -o pp_omp_ex3
[user@computer dir]$ ./pp_omp_ex3
Doing some stuff in thread 0
Doing some stuff in thread 1
[user@computer dir]$ export OMP_NUM_THREADS=5
[user@computer dir]$ ./pp_omp_ex3
Doing some stuff in thread 4
Doing some stuff in thread 2
Doing some stuff in thread 1
Doing some stuff in thread 0
Doing some stuff in thread 3
[user@computer dir]$