title: How to use std::string in a QLineEdit?
body: <p>I have the following problem. I am trying to integrate a large code written by me with a Qt interface.</p>
  
  <p>Some of my functions return <code>std::string</code>. I did not succeed in making <code>QLineEdit::setText</code> accept them (other functions returning <code>char</code> do not give me problems).</p>
  
  <p>What should I do? Thanks!<br>
  Giuseppe</p>