Re: Calling a File for Encryption from outside of the Main Ada-95 Holding Folder.

[Dennis Lee Bieber <wlfraed@ix.netcom.com>]

On Wed, 4 Sep 2013 04:10:13 -0700 (PDT), Austin Obyrne
<austin.obyrne@hotmail.com> declaimed the following:

	I'm going to snip a lot of this and get to one point...
>Up to now I thought a file of plaintext for encryption always has to go through the AdGide editor for the compiler to 'see' it - True or false.
>

	The "compiler" NEVER sees the plaintext...

	The compiler is used to "compile" the source code of the encryption
/program/ into an executable.

	The executable program is what has to see the plaintext as input, and
produce some other file as the encrypted output.

	The simplest way is probably to use stdin and stdout via command line
redirection (a feature of the operating system, not of the
language/compiler). If the "key" is a compiled in constant, this would mean
using a command line on the form of:

	encrypt <plain.txt >cypher.txt

	The next step above would be to use the language features to access the
command line arguments. That would let one enter a "key" on the command
line, along with the file names

	encrypt    thisISaK3y	plain.txt	cypher.txt

	Note how none of the above is sensitive to the language -- Python, Ada,
C/++, Java ALL react the same way.

You'll forgive if I don't take the time to actually code an example -- it's
going on 2330 hours and I need to go to work in the morning...
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/