20000405-1.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

// Copyright (C) 2000 Free Software Foundation

// by Alexandre Oliva <[e-mail]>
// simplified from libio/floatconv.c

static const double bar[] = { 0 };
int j;

double
foo ()
{
  return bar[j];
}