Using the following code, answer the following questions

1. #pragma omp parallel

2.{

3. id-omp-get thread num ();

4. numThreads - omp_get num threads0

5, printf ("Hello from thread %d of %din", id, numThreads);

6.}

a. What is the output of the above program in PI 3 B+?.

b. What does the statement at line 1 mean?

c. How to compile the following code (executable should not be / a out) ?

d. What does the statement at line 4 (after the equal sign) mean?

Answer explained

Explanation:

as PI 3 B + is quadcore processor (i. e. 4 cores)

omp_get_thread_num () is used for getting thread number. (i. e. 0,1,2,3)

omp_get_num_threads () is used for getting number of threads. (i. e. 4)

1. Output should be,

Hello from thread 0 of 4

Hello from thread 1 of 4

Hello from thread 2 of 4

Hello from thread 3 of 4

2. #pragma omp parallel is used to fork (create child) additional threads to carry out the work enclosed in the construct in parallel.

3. We can Compile this code using,

gcc - o omp_helloc - fopenmp hello. c

4. We can Run this code using,

./hello

5. omp_get_num_threads () is used for getting number of threads. (i. e. 4)