Hello every one.

I was kinda ?ncertain lately about what program I should use to create 2d games.

But im sure going to write the code in c++.

it will be 2d multiplayer game, and I want it to run smoothly on any computer.

I need advices please.

What part do you need help with? Are you trying to pick a library to get access to graphics, sound and input? If that's what you are asking, SFML, SDL and Allegro are all good choices (I like SFML because its design matches the way I use C++ very well, but there's probably nothing wrong with the others).

If you are asking about how to do the networking, how much do you already know about networking?

Use the language you are most comfortable using and then import one of the libraries Alvaro mentioned. Those libraries will make your life much easier in some ways.

Just basing from your second sentence, I'm going to assume you have no prior experience in game programming.

I'm going to ask you to program simpler games. Pong being the most simple game to program in complexity but will test many areas of your knowledge.

My advice would be to read the book "beginning game programming (3rd edition)", by jonathan s harbour. My 2nd advice is to finish one or to simple games before starting a bigger project, including multiplayer stuff etc. You'll be amazed how many people didn't even finish their first pong, asteroidz, pacman etc. :)

I made a own version of asteroidz in about 2 weeks, After I finished the book that is (at nights/ weekends). Mind that basic c++ knowledge is a pre before starting with specific game development (if you go for c/c++).

Agree with warnexus. Probably that is a little too ambitious right away.

Careful with the ...

I want it to run smoothly on any computer

... part.

To get it to run on different platforms it needs to be compiled for those platforms (CPUs and Operating Systems) because C++ code can be portable but never platform independent. Setting up the build process will be enough of a challenge to keep you busy for weeks or even month if you do not know where/how to steal a code base layout/setup.

To get it to run on Android you need to look into the not so easily accessible parts / APIs of Android (Android NDK) ... and afaik you still need different builds for different devices, unless they found a way to deal with that problem. Not sure.

Java would be better if that is a priority. Unfortunately the way the programs (executable JARs) are installed and executed on desktop computers is messed up (IMO).