#include
#define MAX 16
#define MAX_THREAD 4
using namespace std;
//place arr, key and other variables as global to access from different thread
int arr[] = { 1, 6, 8, 11, 13, 14, 15, 19, 21, 23, 26, 28, 31, 65, 108, 220 };
int key = 31;
bool found = false;
int part = 0;
void* binary_search(void* arg) {
// There are four threads, each will take 1/4th part of the list
int thread_part = part++;
int mid;
int start = thread_part * (MAX / 4); //set start and end using the thread part
int end = (thread_part + 1) * (MAX / 4);
// search for the key until low < high
// or key is found in any portion of array
while (start key)
end = mid – 1;
else
start = mid + 1;
}
}
main() {
pthread_t threads[MAX_THREAD];
for (int i = 0; i < MAX_THREAD; i++)
pthread_create(&threads[i], NULL, binary_search, (void*)NULL);
for (int i = 0; i < MAX_THREAD; i++)
pthread_join(threads[i], NULL); //wait, to join with the main thread
if (found)
cout
