#include <stdio.h>
#include <string.h>
#pragma linkage (isplink, OS)
#define SERVICE "'LMOPEN '"
#define OPTION "'INPUT '"
main ()
{
extern int isplink();

int retcode;

char8 DATAID;

⋮

strcpy (DATAID,  "DATA    ");
retcode = isplink (SERVICE, DATAID, OPTION);
}