title: How can I add breakpoint to internal function
body: <p>I'm using GDB to step through the code.</p>
  
  <p>The problem is my code has functions from external files. Is there a way on stepping through inner functions?</p>
  
  <p>like this: </p>
  
  <pre><code>    int main 
      { 
      string a ="AAA"; 
      DoString(a);
      }
  </code></pre>
  
  <p>Is there a way on stepping through execution of DoString with GDB?</p>