#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>

int value = 5;

int main()
{
  int pid;

  pid = fork();

  if (pid == 0)    /* child */
  {
    value += 15;
    printf("Child says value = %d\n", value);
    return 0;
  }
  else if (pid > 0)    /* parent */
  {
    wait(NULL);
    printf("Parent says value = %d\n", value);
    return 0;
  }
}