blob: c7c67712a6912bf48f41f13fa59d35ab518ba010 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/*
* Copyright (C) 2014 - 2015 Tomasz Kramkowski <tk@the-tk.com>
*
* This program is free software. It is licensed under version 3 of the
* GNU General Public License.
*
* 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 <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
if (argc != 3) {
fprintf(stderr, "Usage: <text> <rotation>\a\n");
exit(1);
}
int rot = strtol(argv[2], NULL, 10);
unsigned length = strlen(argv[1]);
for (unsigned i = 0; i < length; i++) {
if (isalpha(argv[1][i])) {
if (argv[1][i] - 'A' < 26)
putchar((argv[1][i] - 'A' + rot) % 26 + 'A');
else
putchar((argv[1][i] - 'a' + rot) % 26 + 'a');
} else
putchar(argv[1][i]);
}
putchar('\n');
return 0;
}
|
