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

struct shared
{  int x;
   double y;
};

void * thread1(void * s)
{ struct shared * data;
  data = (struct shared *)s;

  while (data->x < 8000)
    {
       printf("thread1: ");
       printf(" x == %d\n",data->x);
       fflush(stdout);
       data->x = data->x + 1;
    }
}// thread1

void * thread2(void * s)
{ struct shared * data;
  data = (struct shared *)s;

  while (data->x < 8000)
    {
       printf("thread2: ");
       printf("x == %d\n",data->x);
       fflush(stdout);
       data->x = data->x + 1;
    }
}// thread2

int main()
{ pthread_t tid1, tid2;
  struct shared s;
  s.x = 0;
  s.y = 3.14;  

  pthread_create(&tid1,NULL,thread1,&s);
  pthread_create(&tid2,NULL,thread2,&s);

  pthread_join(tid1,NULL);
  pthread_join(tid2,NULL);

  printf("main thread: terminating\n");
  exit(0);
}// main