title: Change char at index from char pointer
body: <p>I know that the following is invalid:</p>
  <pre><code>char *string = &quot;Some String&quot;:
  string[1] = 'v';//INVALID
  </code></pre>
  <p>But how can I achieve the desired behavior here, without changing the type of string to some sort of char array?</p>
  <p>The final value in string should be 'Svme String'</p>