C++ OpenMP Examples

Can you show me some examples of using OpenMP in C++?

Sure! OpenMP is a great way to parallelize your C++ code. Would you like to see a simple example of parallel for loops?

Yes, please! A simple example would be great.

Here's a basic example:

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

int main() {
    #pragma omp parallel for
    for (int i = 0; i < 10; i++) {
        std::cout << "Thread " << omp_get_thread_num() << " is processing index " << i << std::endl;
    }
    return 0;
}

This code will run the loop in parallel using multiple threads.

That looks good! Can you explain how the #pragma omp parallel for works?

Of course! The #pragma omp parallel for directive tells the compiler to split the for loop into multiple threads. Each thread executes a portion of the loop iterations concurrently, which can significantly speed up processing.