title: Inserting characters into a string
body: <p>I want to add <code>""</code> to <code>{"status":true}</code> so that the string looks like <code>"{"status":"true"}"</code>. How can I insert characters to a string at specific locations?</p>
  
  <p>I tried <code>strncat()</code>, but wasn't able to get the desired result. I read that you need to create your own function for that. Can anyone show me an example?</p>