But still on basics

If you are still on basics, you can't make a game.
Learn the language first.

That depends. A random number guessing game is just a few lines of code and doesn't require intricate knowledge of a programming language.

GameCreator has a valid point. My suggestion is to start small. Take GameCreator's advice and create a random number game. After you finish that, take a stab at another little game. You need to build up your skills (which is often overlooked by new programmers).

[quote name='Sugavanas' timestamp='1355624564' post='5011136']
But still on basics

If you are still on basics, you can't make a game.
Learn the language first.
[/quote]
This is the hard, but very real truth. You can't create a game in a language if you do not know the language. Learn your basics and learn them well.

EDIT: I figured I would answer your original question as well. If you look online quite a few companies have released the source code to their games. Id Software's Doom 3 comes to mind. You can find the source code here. With that being said, be prepared to have it handed to you. The level of coding that goes into games is extremely high. With that being said, however, studying other peoples code is an important part of learning to program.

The level of coding that goes into games is extremely high. With that being said, however, studying other peoples code is an important part of learning to program.

I very much agree that studying code is an important factor, but I don't believe it's applicable yet to the OP.
At this stage a good understanding of the language is a priority, especially so with C++ as there are so many ways to write functioning but terribly written C++ code. Source code for finished games might not always reflect the best practices, or might just do some things in a terribly hack-ish way because of time constraints or because something needed to be fixed quickly (I haven't looked at the source code for Doom myself, so I couldn't say whether this applies here).


Getting code for complete games just handed to you is not going to be all too helpful right now, it mostly encourages copy-paste behaviour and unless every technique/pattern/whatever used in the code is thoroughly documented, you probably won't understand the reason why the developer chose to use a certain technique at a certain location, or what the technique is even supposed to do.

The important thing now is to understand how to use the basic paradigms provided by C++ correctly at an elementary level, and how to properly implement problem solutions with these. Learn about the basic OOP principles, learn about what kind of functionality C++ provides to support OOP, learn about what kind of useful stuff the C++ standard library provides, etc. and work your way up starting from a very simple 'hello world' application while applying the concepts you've learned and using the data structures (eg. lists, maps, vectors, queues, stacks, etc.) and functionality you've read about.

Once you have some knowledge of object-oriented design and the tools your language provides it'll become clearer to you how to implement a simple game such as tic-tac-toe yourself.