title: How can i include *.cpp files in my c++ project?
body: <p>I have to write UnitTest with CppUnit library but i need little help. 
  I'm including mainfunction in my test class but it doesnt works.</p>
  
  <p><a href="https://i.stack.imgur.com/YE61a.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YE61a.png" alt="Here is the ss from eclipse"></a></p>