#include <stdio.h>

#define ERROR -1

main()
{
   int i, status;

   if ( fork() ){    
	wait(&status);
        printf("parent - pid= %d, ppid= %d\n",getpid(),getppid());
   }
   else {
        printf("child - pid= %d ppid= %d\n",getpid(),getppid());
        for(i=1;i< 100000000;i++) ;
   }
	printf("\n Common part of parent+child\n");
}