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

 /* thread function */
 void* mytask(void* data)
 {
   int i;

   for(i=0; i<10; i++)
   {
     sleep(1);
     printf("Task of thread number: %d\n", *(int*)data);
   }
 }

 int main()
 {
   pthread_t thread_1, thread_2;
   int no1 = 1, no2 = 2;
   int i;

   /* create threads */
   pthread_create(&thread_1, NULL, mytask, &no1);
   pthread_create(&thread_2, NULL, mytask, &no2);

   for(i=0; i<10; i++)
   {
     sleep(1);
     printf("Main!\n");
   }

   /* wait for threads */
   pthread_join(thread_1, NULL);
   pthread_join(thread_2, NULL);
 }