/************************************************\
              caesar.c livinded 2006

  This uses a simple encryption method known as
  the caesar cipher to encrypt a line of text
  entered by the user by offsetting the value
  of the letters in a line entered, or decrypt
  a line of line of text by selecting the 
  correct negative offset.

  Do whatever the hell you want with this, it's
  open source and all that fancy stuff.

\***********************************************/

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

#define LINEMAX 80

char positive(char *s, int shift);
char negative(char *s, int shift);
void file(char *file, int shift);

int main(int argc, char *argv[])
{
	int shift;

	if (argc == 1)
	{
		int i;
		char *p;
		char line[LINEMAX];
		char linemodified[LINEMAX];

		printf("Enter the number of shifts you want to make up or down.\n>>> ");
		fgets(line, sizeof(line), stdin);
		sscanf(line, "%d",