title: how to fix "no input files" in code::blocks code c++
body: <p>I installed <code>code::blocks</code> but I don't know why every project I open shows the message <code>"error; no input files"</code>. The name of the .cpp file has an lock, and I want to know how I open a folder of projects in it.</p>
  
  <p>I searched and I couldn't find an answer probably because it is not a common issue.</p>
  
  <p>Here is a screenshot:</p>
  
  <p><a href="https://i.stack.imgur.com/ucVhK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ucVhK.png" alt="screenshot"></a> </p>
  
  <p>It's like the project doesn't exist anymore.</p>