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Control Flow

2 (2.2%)

Arrays, Strings, Pointers, and References

8 (9%)

Functions

4 (4.5%)

Basic object-oriented programming

30 (33.7%)

A bit more advanced OOP (Composition, Operator overloading, Inheritance, Virtual Functions)

18 (20.2%)

Templates

8 (9%)

Other (Explain)

4 (4.5%)

Working with files?  (Streams)

15 (16.9%)

Total Members Voted: 89

[Mephansteras]

Haven't done much with AJAX, personally. That might be an interesting project to look into.

Oh, as for a perl resource, this is required: http://www.cpan.org/

cpan is the giant library of perl modules for, well, just about everything. One of the things that keeps perl useful as a language is the giant amount of open source libraries available for it.

[alfie275]

Awesome thread, Alfie!

[Outcast Orange]

Thanks for the push to better myself!
I've figured out how to do basic text file inputs!

"Party House" now sucks in a text list as possible conversation topics.

EDIT:

Here is the first problem:

I have a char array which is currently holding the values of "1" and "0" which represent "10".

I need that to be an int representing 10.

How do I convert a char to an int.
I don't want the values of the characters, but the value they represent.
So I don't want my int to have a 1 in it or a 0, but a 10.

[Bricks]

You could loop through the character array backwards and add (the character's integer representation)*10^(the counter on the loop) to a dummy variable, which would eventually be your output.  Without knowing what functions are available in C++, however (I'm guessing that is what you are using), there may be an easier way.  Most languages I have worked with have a string -> integer function.

I might try challenge 1, since it's basically a problem of representing a nonstandard numbering system and making all of the relevant operations work on it - addition, subtraction, and printing for sure.  Multiplication wouldn't be too bad; division would take some serious thought.  I think I understand how to set it up in python, but there are certain challenges and special cases there that I'm not prepared for.  Challenge 3 would be good practice, too, for a general parser.  I once wrote a program for rotating certain functions on my graphing calculator.  It had the exciting property of sometimes working.  The math involved for challenge 3 would be largely trivial when using the quadratic formula, but there are special cases like "3/2*x^2" which would require special parsing and handling to make sure that the fraction is not treated as a float.  I *think* python has a fraction class...

[Dave Mongoose]

Here is the first problem:

I have a char array which is currently holding the values of "1" and "0" which represent "10".

I need that to be an int representing 10.

How do I convert a char to an int.
I don't want the values of the characters, but the value they represent.
So I don't want my int to have a 1 in it or a 0, but a 10.

This kind of conversion is called 'parsing'. There's a variety of solutions given here:

http://stackoverflow.com/questions/194465/how-to-parse-a-string-to-an-int-in-c

(They're for C++, even though the link says "in-c")

[Outcast Orange]

Thanks for the help, that page was really useful.

I've got all sorts of text files feeding my project now.

[Alexhans]

Thanks for the input.  Remember to keep suggesting things, posting solutions on a pastebin or sending them, sharing information and having fun while learning.

I have little time right now but I feel the need to write about a particular subject that many people might not know about and may come quite handy when debugging certain programs (Very useful for challenges with huge tests cases).

EDIT:  Thanks, qwertyuiopas:  "as a clarification, those are commands to your system(windows: command prompt. other OSs: probably terminal)."

To redirect the input means that data can be obtained by a different mean than the standard input, e.g.: A file.  If we assume we have a file called redir.cpp that allows data from the standard input, the following command would execute the program redir and it would obtain de input data from a file named fdata.in

Code: [Select]

redir < fdata.in
Likewise, redirecting the output means you're sending the results to a different mean than the standard output.  e.g.: A file.  Using the same example of redir.cpp, the following order would execute the redir program and write its results in a file named fdata.out

Code: [Select]

redir > fdata.out
You can also do both redirections at the same time:
e.g.:

Code: [Select]

redir < fdata.in > fdata.out

[qwertyuiopas]

You can also redirect the output of one program to be the input of another.

Code: [Select]

program1 | program2

[eerr]

Spoiler (click to show/hide)

Thanks for the input.  Remember to keep suggesting things, posting solutions on a pastebin or sending them, sharing information and having fun while learning.

I have little time right now but I feel the need to write about a particular subject that many people might not know about and may come quite handy when debugging certain programs (Very useful for challenges with huge tests cases).

To redirect the input means that data can be obtained by a different mean than the standard input, e.g.: A file.  If we assume we have a file called redir.cpp that allows data from the standard input, the following command would execute the program redir and it would obtain de input data from a file named fdata.in

Code: [Select]

redir < fdata.in
Likewise, redirecting the output means you're sending the results to a different mean than the standard output.  e.g.: A file.  Using the same example of redir.cpp, the following order would execute the redir program and write its results in a file named fdata.out

Code: [Select]

redir > fdata.out
You can also do both redirections at the same time:
e.g.:

Code: [Select]

redir < fdata.in > fdata.out

Is that third redir the equivalent of the first two combined?
redir<fdata.in returns redir?

You can also redirect the output of one program to be the input of another.

Code: [Select]

program1 | program2

I see.
Is program1 outputting into program2, or vice-versa?

[alway]

Here's a site I found useful for splicing code together with other examples when learning the very beginning parts of DirectX 9 programming: http://www.directxtutorial.com/

Most of the stuff that is a bit further on is behind a paywall, but the free stuff can be useful, mostly because the explainations are clear and each page has the full source code from the program at the end. Keep in mind, one does have to beware of a few incompatibilities with other tutorials (namely, using FVFs, something which the book I was using did not). But when combined with lessons from the early chapters of Frank D Luna's book (Introdction to 3D game programming with directx 9.0c, a shader approach) and theForger's win32 tutorials, the code turned out workable at least.

As for me, I plan on getting through the rest of Luna's book before starting on an HSLS (shader language) book, with a bit of learning about learning algorithms on the side.

Also, does anyone know of a way to make a C++ program compile another C++ program w/o user input?

[qwertyuiopas]

...

Is that third redir the equivalent of the first two combined?
redir<fdata.in returns redir?

...

I see.
Is program1 outputting into program2, or vice-versa?

Program1 outputting into program2.
The third is the first two combined.

However, as a clarification, those are commands to your system(windows: command prompt. other OSs: probably terminal).

If you use them often, the | one appears frequently as

Code: [Select]

| more

[timmeh]

I'd love something on templates some time, never really did get a good grasp on them.  Should go back and read through the learncpp.com article on them some time...

I'll contribute something later, been considering writing something really simple to help with file streams, particularly binary stuff.... 

[Alexhans]

Thanks, qwertyuiopas.  I wasn't clear enough.

I edited that.

I'd love something on templates some time, never really did get a good grasp on them.  Should go back and read through the learncpp.com article on them some time...

I'll contribute something later, been considering writing something really simple to help with file streams, particularly binary stuff.... 

The learncpp articles on templates are pretty useful.  I could grab/make some challenges that involve their usage though.  You're welcome to add whatever you think might help.

I've been sick all morning (unlike me) so I'll just go back and rest it out.  See ya.

[winner]

I'm going to try exercise one with common lisp because I'm trying to learn it.

[eerr]

hmmm, are there any irc clients that load into a web-broa

...

Is that third redir the equivalent of the first two combined?
redir<fdata.in returns redir?

...

I see.
Is program1 outputting into program2, or vice-versa?

Program1 outputting into program2.
The third is the first two combined.

However, as a clarification, those are commands to your system(windows: command prompt. other OSs: probably terminal).

If you use them often, the | one appears frequently as

Code: [Select]

| more

"However, as a clarification, those are commands to your system(windows: command prompt. other OSs: probably terminal)."
I have been doing C projects on my schools linux server. But it is good to know for certain.
BTW, I hear macs have alternate tools for managing this sort of interaction. Know anything interesting?