#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#define NUM_THREADS 5
void *thread_function(void *arg) {
printf("Hello World from %d!\n", (int)arg);
sleep(1);
pthread_exit(NULL);
}
int main(int argc, char *argv[]) {
int i;
pthread_t threads[NUM_THREADS];
for (i = 0; i < NUM_THREADS; i++)
pthread_create(&threads[i], NULL, thread_function, (void *)i);
for (i = 0; i < NUM_THREADS; i++)
pthread_join(threads[i], NULL);
return 0;
}
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