home *** CD-ROM | disk | FTP | other *** search
- {
- GPC demo program. Reverse the characters of a string read from the
- input. The point is not that it's possible at all, but that it's
- possible without having to declare *any* variable -- of course, this
- recursive way is not the most efficient solution, it's just a nice
- little thing one can do with file buffers. (File buffers are a
- Standard Pascal feature missing in many popular Pascal compilers.)
-
- Copyright (C) 1999-2001 Free Software Foundation, Inc.
-
- Author: Frank Heckenbach <frank@pascal.gnu.de>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation, version 2.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-
- As a special exception, if you incorporate even large parts of the
- code of this demo program into another program with substantially
- different functionality, this does not cause the other program to
- be covered by the GNU General Public License. This exception does
- not however invalidate any other reasons why it might be covered
- by the GNU General Public License.
- }
-
- program FileBufferDemo1;
-
- procedure Reverse (ch : Char);
- begin
- Get (Input);
- if not EOLn then Reverse (Input^);
- Write (ch)
- end;
-
- begin
- Write ('Enter a string: ');
- while EOLn do Readln;
- Write ('The reversed string is `');
- Reverse (Input^);
- Writeln ('''')
- end.
-