how to do a reserve engineering to a binary file?

[vac1]

Dear all,
I wonder is there any way to get our source code once after compiled to binary?
let say my program as below,
source code:

#include <stdio.h>
void main(){
 printf("Hello World")
}

Pardon me for my english
Any respond shall be useful for me

Thanks

[Duthomhas]

Not usually. If your decompiler gets very far at all, the source it gives you will always be different than your original --though its essentials will be the same.

To get an idea of the difficulties, read up here:
http://en.wikipedia.org/wiki/Decompilation

If undaunted, google around "c decompiler" and "c disassembler" and good luck!

[vac1]

I will try that.
Thanks