title: How to take argv starting at specific index
body: <p>I want to pass argv to execvp but starting at a certain index i other than 0. How do I do that? I thought of copying the arguments starting at i into another array and use that array but the number of arguments is not fixed and doesn't look like that's possible without dynamic allocation which I'm new to. I think there is a simpler way to just have argv point to i but I can't figure it out.</p>
  <pre><code>execvp(command, argv); //need argv to start at index 3
  </code></pre>