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

void f(char* s)
{
  int i;
  printf("Hello from : %s\n", s);
  fflush(stdout);
  for (i = 0 ; i < 100000000; i++)
    {
      float f = sqrt(i);
    }
  printf("Goodbye from : %s\n", s);
  fflush(stdout);
}

int main()
{
  pthread_t t1;
  pthread_t t2;

  pthread_create(&t1, NULL, (void*) &f, "One");
  pthread_create(&t2, NULL, (void*) &f, "Two");

  pthread_join(t1, NULL);
  pthread_join(t2, NULL);

}