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ramoneur

Member

Registered: 2007-06-04

Posts: 89

C++ simple encryption help

hey im a total newb @ C++ but im making a simple encryption program for a small project of mine.
anyway what i want is, take the text from a variable and encrypt it and then send the encrypted text to a new variable.
i have 2 char arrays holding the letters and respective "encrypted" letter.

looks like this:
char *alfa  = "abcdefghijklmnopqrstyvwxyz";
char *beta = "mqfjhldxgnwersuabkizpyvtco";

(ive also thought about having 2 strings holding the letters if thats easier, like this:
string alfa ("abcdefghijklmnopqrstuvwxyz");
string beta("mqfjhldxgnwersuabkizpyvtco");)

anyway, i have no idea of how to convert the letters in a variable to the respective letters as seen in the *beta variable.

im very happy for any help i can get, and please i know this is neewbish, but im in the beginning of learning C++ (and programming at all )

and im sorry for my english.

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phrakture

Arch Overlord

From: behind you

Registered: 2003-10-29

Posts: 7,879

Website

Re: C++ simple encryption help

Is this school based? Or personal? Is there any reason you cannot just use an existing one-way hash implementation, like md5 or sha1?

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Cerebral

Forum Fellow

From: Waterloo, ON, CA

Registered: 2005-04-08

Posts: 3,108

Website

Re: C++ simple encryption help

http://www.cplusplus.com/reference/string/
That should have enough information for you to figure out what you need.

ramoneur

Member

Registered: 2007-06-04

Posts: 89

Re: C++ simple encryption help

thanks cerebral, ill read through it.
and phrakture: its personal

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drakosha

Member

Registered: 2006-01-03

Posts: 253

Website

Re: C++ simple encryption help

beta is basically array with letter to put instead of 'a' in place 0, instead of 'b' in place 1 and so on.
so, beta[ch - 'a'] will give you "encrypted" letter which should be used instead of char ch.

Xilon

Member

Registered: 2007-01-01

Posts: 243

Re: C++ simple encryption help

You want a char array, so why use string or char*? Go for char[]