Thread ex

#include <pthread.h>
#include <stdio.h>

pthread_mutex_t mutex;

void *hungry_task()
{
    sleep(15);
    int result = 42;
    pthread_mutex_lock(&mutex);
    pthread_mutex_unlock(&mutex);
    pthread_exit(&result);
}

int mein_get() {
    void *result
    pthread_mutex_unlock(mutex);
    pthread_join(tid, &result);
    return (int*)result;
}

int main()
{
    pthread_t threadz;

    pthread_mutex_lock(&mutex);

    pthread_create(&threadz, NULL, hungry_task, NULL);
    sleep(15);
    int result = mein_get();

    printf("Result: %d\n", result);

    return 0;
}