title: What is the C runtime library?
body: <p>What actually is a C runtime library and what is it used for? I was searching, Googling like a devil, but I couldn't find anything better than Microsoft's: "The Microsoft run-time library provides routines for programming for the Microsoft Windows operating system. These routines automate many common programming tasks that are not provided by the C and C++ languages."</p>
  
  <p>OK, I get that, but for example, what is in <code>libcmt.lib</code>? What does it do? I thought that the C standard library was a part of C compiler. So is <code>libcmt.lib</code> Windows' implementation of C standard library functions to work under win32?</p>