textfile 2

Part 1

I need to write a program called Encrypt.cpp, which opens a text file. The name of this file is provided by the user. The program reads every character from this input file, adds 2 to the ASCII value of it, and prints the resulting character into a new file called output.dat.

Part 2

I then need to write a program called Decrypt.cpp, which opens a file containing encrypted data created using the scheme used in question 2. The decrypt program deciphers the text and displays it on the screen.

Thanks

That's great! I need to write a game server for my MUD.

Quote:

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Originally posted by davidnj732
Part 1

I need to write a program called Encrypt.cpp, which opens a text file. The name of this file is provided by the user. The program reads every character from this input file, adds 2 to the ASCII value of it, and prints the resulting character into a new file called output.dat.

Part 2

I then need to write a program called Decrypt.cpp, which opens a file containing encrypted data created using the scheme used in question 2. The decrypt program deciphers the text and displays it on the screen.

Thanks

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That's nice, we all have *things to do*. Perhaps you could start by doing your own homework, posting specific questions, and above all, limiting posts on the same subject to a single thread.

Thank you.

Here's a little snippet.

Code:

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char c;
FILE *ifp, *ofp;

/*...some code here...*/

ifp = fopen("myfile.txt", "r");
ofp = fopen("output.dat", "w");

/*...some more code...*/

c = getc(ifp);
c += 2;
fprintf(ofp, "%c", c);

/*...some more code...*/

fclose(ofp);
fclose(ifp);

/*The End*/

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How about instead of showing us a snippet and waiting for us to do it for you, you actually try and do it yourself or ask some questions.

>>How about instead of showing us a snippet and waiting for us to do it for you, you actually try and do it yourself or ask some questions.<<

You're confusing me bud :confused: Are your referring to me or to that newbie C++ programmer?

Rez, I think RoD thought you were the same people. I don't think you should have given him all that code though, lol

//napKIN

I was trying to give the little guy an idea :rolleyes:

thanks guys for you input. Just trying to learn something new. Professor gave us a challenge and I didn't have a clue how to begin or what I was doing. Still really a newbie. He gives us these challenges all the time.

Rez, your code is C, with this being a C++ forum, I expect davidnj732 is writing C++, so I'm afriad your examples won't help. ;)

davidnj732: Start with a tutorial or two. Post code when you get stuck.

:D Well... I can't think of any other File I/O technique. Is there such a thing as an "entirely-different-from-C-that-is-unique-to-C++" File I/O routine? :confused:

Quote:

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Originally posted by Rez
:D Well... I can't think of any other File I/O technique. Is there such a thing as an "entirely-different-from-C-that-is-unique-to-C++" File I/O routine? :confused:

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http://www.cppreference.com/cppio.html

:) Hey pretty neat!

Code:

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:startover
open a file
read 1 charater
convert it to acsii number
add 2 to it
convert it to a character
if youve reached EOF goto done
else jump startover
:done
write to file

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thats to encrypt it, if ya need more pseudo code to decrypt it, jsut ask, noone will (they shouldnt anyways) be writing code for you.