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/*
* Copyright (C) 2014 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>
#define mod(A) ((A)%26)
int main(int argc, char **argv)
{
if(argc!=3)
exit(1);
char *string = *(argv+1);
int i, rot = (int)strtol(*(argv+2), NULL, 10);
for(i=0; i<strlen(string); i++)
if(isalpha(string[i])){
if(string[i]-'A'<26){ // Simple way to differentiate lower and upper case if all letters are known to be alpha.
putchar(mod(string[i]-'A'+rot)+'A');
}else{
putchar(mod(string[i]-'a'+rot)+'a');
}
}else{
putchar(string[i]);
}
putchar('\n');
return 0;
}
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