Help ..

I want to write a application in "C" a small application for small kids.
This has to be installed in computers all OS. The application when double clicked will seek number and do add and substract. Very simple but i am beginner. Please tell me how.

Please seek advice in telling me which compiler and linker to download, I just have Internet and cannot afford to buy compiler/linker or IDE. So please advice me on how to download a good free compiler and linker.

2. Once i get the executable, i want to make it application so that i send it online to various schools to install and execute like many experts applications here.

Regards
-- Sanjay

There is other great material there, too. Read it.

C is a compiled language. It produces executable code in the native language of the processor for which it is compiled. There are many types of microprocessors, many of which have their own native language. A program compiled for one type will normally not run on another type.

Further, a program compiled for one particular OS may very well not run under another OS.

If you want to be a programmer you are going to have to learn at least a few relevant facts before you can successfully jump into the sea of abstraction (and avoid drowning).

Then perhaps you should be considering Java instead

What OS? You may want to run " in computers all OS", but tool chains won't. The closest you will get is GCC which has variants for many targets and is almost ubiquitous. That said it is not the easiest place to start, and no 'small kid' is going to be impressed by your initial command line/text only effort. I suggest you ignore the cross-platform idea and the target consumer for the time being and just concentrate on learning to program. If you are using Windows I sugegst that you use this. If you are using Linux, it probably has the GNU toolchain already installed; if you want an IDE for it consider this , and for OSX use Apple's Cocoa tools.

Good. But learn to walk before running - there is a long path between here and there. It is good to have a goal at the end of your journey, but you have to learn to drive first! (Sorry about the horribly mixed metaphors!).

Clifford