int main(int argc, char **argv) {
    // ProcessTime example

    struct timeval startTime;
    struct timeval endTime;

    // get the current time
    // - NULL because we don't care about time zone
    gettimeofday(&startTime, NULL);

    // algorithm goes here
    what_you_want_to_time();

    // get the end time
    gettimeofday(&endTime, NULL);

    // calculate the time
    printf("Execution time: %ld.%d\n", (endTime.tv_sec - startTime.tv_sec), (endTime.tv_usec - startTime.tv_usec));

    return 0;
}