title: string.c_str() is const?
body: <p>I have a function in a library that takes in a <code>char*</code> and modifies the data.</p>
  
  <p>I tried to give it the <code>c_str()</code> but c++ docs say it returns a <code>const char*</code>.</p>
  
  <p>What can I do other than newing a char array and copying it into that?</p>