prog/c/caesar/encrypt.h

/*
** Copyright @ 2020 Joshua Branson <jbranso@member.fsf.org>
**
** 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; either version 3 of the License, or (at
** your option) any later version.
**
** It 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.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <argp.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>  //abs

const char * argp_program_version = "0.4";

const char * argp_program_bug_address = "jbranso@dismail.com";

void encrypt (int shift, FILE * stream);

FILE * maybe_open_file ();