title: I'm using Xcode for c++ programming and study. Why can't I put many separate source files with MAIN function in one project?
body: <p>I think I can do it in eclipse. 
  BTW, every time I make a new C++ file with the system default template.</p>
  
  <p>It has <code>#include &lt;stdio.h&gt;</code> instead of <code>#include &lt;iostream&gt;</code></p>
  
  <p>How to fix it?</p>