alpha_mirror.c

#include <unistd.h>

int main(int argc, char **argv)
{
	int i = 0;

	if (argc == 2)
	{
		while(argv[1][i]) 
		{
			if(argv[1][i] >= 'a' && argv[1][i] <= 'z')
				argv[1][i] = ('a' + 'z') - argv[1][i];
			else if (argv[1][i] >= 'A' && argv[1][i] <= 'Z')
				argv[1][i] = ('A' + 'Z') - argv[1][i];
			write(1, &argv[1][i], 1);
			i++;
		}
	}
	write (1,"\n",1);
	return (0);
}