title: Return an empty C-String
body: <p>Simple Question:</p>
  
  <p>How do you return an empty C-String with as little code as possible?</p>
  
  <p>I have code that needs to return an empty <code>char*</code>.  I am looking for something along the lines of <code>return "";</code>.  I know there are several ways to do this, but I am looking for the most efficient way possible.</p>
  
  <p>Using <code>return "";</code> gives <code>warning: conversion from string literal to 'char *' is deprecated [-Wdeprecated-writable-strings]</code></p>
  
  <p>Thanks!</p>