title: Adding to c* invalid conversion from const char* to char*"
body: <p>I have the function below in a file called <code>WiServer.h</code> for Arduino.</p>
  
  <pre><code>GETrequest(uint8* ipAddr, int port, char* hostName, char* URL);
  </code></pre>
  
  <p>Now the problem is I need to concatenate an int value (setting1) to the <code>char*</code> URL parameter like the below for example.</p>
  
  <pre><code>"twittermood.php?status=sendTweet&amp;setting1="+setting1
  </code></pre>
  
  <p>I get an error:</p>
  
  <blockquote>
    <p>invalid conversion from const char* to char*</p>
  </blockquote>
  
  <p>How do I fix it?</p>