You can use this software for professional use. You can compile and run your simple C code. It is simple C compiler, because, it doesn't support custom include files. Also, it doesn't support recursion and 'short' data type. It doesn't support C++ feature like dynamic memory allocation, class, struct, macros.... It runs on 64 kilo byte memory space. You cannot use large array which exceeds 32 kilo bytes. But, you can use advanced coding like pointer, array, strings, FILE, time, random number generator .... Its help segment is very well documented. In the help section, you will get details about each function. Just click on any sample, and then run. If you want to develop any software using C++, java, php, mysql or javascript, please contact with me at [email protected]