When you write a c++ program, the next step is to compile the program before running it. The compilation is the process which convert the program written in human readable language like C, C++ etc into a machine code, directly understood by the Central Processing Unit. There are many stages involved in creating a executable file from the source file. The stages include Preprocessing, Compiling and Linking in C++. This means that even if the program gets compiled, it may result in not running as errors may arise during the linking phase. Hence most IDE (Integrated Development Environment ) like Eclipse, Geany etc consider the term build for transforming source code file to an executable file.

http://www.lifengadget.com/lifengadget/compiling-linking-cplusplus/

A truly gripping story! ...But do you have a question?

this was just an article!! I provided the link!!

there is one question though

do Machine code and object code means the same thing when it comes to .obj file ?