include math.h to insure correct return type

[unix-history] / usr / src / usr.bin / pascal / libpc / LN.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)LN.c 1.3 %G%";

#include <math.h>
#include "h01errs.h"

double
LN(value)

       double  value;
{
       if (value <= 0) {
               ERROR(ELN, value);
               return;
       }
       return log(value);
}