title: rapidjson SetString - GetString
body: <p>I try setting a Value to string, using <code>SetString</code>, but when I try to get it, via <code>GetString()</code>, some random output shows up. Code:</p>
  
  <pre><code>someDoc[someObjKey].AddMember(someStringKey.c_str(), someStringValueAFunctionReturns.c_str(), someDoc.GetAllocator());
  std::cout &lt;&lt; someDoc[someObjKey][someStringKey.c_str()].GetString();
  </code></pre>
  
  <p>What am I doing wrong?</p>