print_r13.c

#include "main.h"
/**
 * print_rot13 - prints a string to ROT13 and places it into a buffer
 * @arg: struct va_arg where printf arguments are allocated
 *
 * Return: counter
 */
int print_rot13(va_list arg)
{
		int i, j, counter = 0;
		int k = 0;
		char *s = va_arg(arg, char*);
		char alpha[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
		char beta[] = "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM";

		if (s == NULL)
			s = "(null)";

		for (i = 0; s[i]; i++)
		{
			k = 0;
			for (j = 0; alpha[j] && !k; j++)
			{
				if (s[i] == alpha[j])
				{
					_putchar(beta[j]);
					counter++;
					k = 1;
				}
			}
			if (!k)
			{
				_putchar(s[i]);
				counter++;
			}
		}
		return (counter);
}