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Path: utzoo!linus!philabs!cmcl2!floyd!harpo!decvax!ittvax!dcdwest!sdcsvax!bmcg!felix!tom
From: tom@felix.UUCP
Newsgroups: net.jokes.d
Subject: How to Rotate a Joke Responses
Message-ID: <232@felix.UUCP>
Date: Tue, 10-Apr-84 09:49:51 EST
Article-I.D.: felix.232
Posted: Tue Apr 10 09:49:51 1984
Date-Received: Fri, 13-Apr-84 01:35:23 EST
Organization: FileNet Corp., Costa Mesa, Ca.
Lines: 85

---
Several weeks ago I asked how to rotate a joke.  The response was
overwhelming. Thanks.
Here are a few of the replies for anyone interested.
---

Here's how to rotate a joke:

Simple rot 13 is easily done with the "tr" program as follows:

	tr a-zA-Z n-za-mN-ZA-M < joke > rotated joke

To avoid typing all of that in every time, you can put the above line in
a file called "rot13" somewhere in your path and do a "chmod +x rot13" to
make it executable.

Alternatively, if you are using the c shell you can put the following line
in the ".cshrc" file in your home directory:

	alias  rot13 tr a-zA-Z n-za-mN-ZA-M

Thereafter, you can rotate the contents of file "a" into file "b" by
typing:
	rot13 <a >b
----

Here is C shell script to rotate a file, it takes one argument (source file).
You can redirect the output to another file.

	# Script to rotate a file (by 13)
	tr A-Za-z N-ZA-Mn-za-m < $argv

Type this script and name it anything you want.  Give it execute permission
(chmod +x).

For example:  If you named it "rot", and you had a file called "joke",
you would use it like this....

	rot joke > joke.rotated

The file "joke.rotated" will contain the rotated joke.  Then this file
can be posted to the net.
---

I'm mailing my rot13 source program which is designed
to rotate whatever you have in a file called: jj
and send the output to the screen (unless you redirect it).
This is good to rotate a joke as well as unrotating it 
Just remembre to have the joke in a file called jj.

Here is the program 



#include <stdio.h>

main()
{
	FILE	*fp;
	char	c,z;
	
	if((fp = fopen("jj","r")) == NULL) {
		printf("tough luck \n\n");
		exit(0);
	}
	while((c = getc(fp)) != EOF) {
		if((c > '@' && c < '[') || (c > '`' && c < '{' )){
			z = c + 13;
			if(z > 'Z' && z < 'h'){
				z -= 90;
				z += 64;
			}
			if(c > 'm'){
				c += 13;
				c -= 122;
				c += 96;
				z = c;
			}
			putchar(z);
		}
		else
			putchar(c);
	}
	printf("\n\n\nDONE\n\n\n");
}