Convert char* array of integers to hex
<p>I have a struct that stores the integer value as a custom string type.</p>

<pre><code>typedef char OneLine[MAX_LINE + 1];
</code></pre>

<p>So I have some instances where I want the string that contains <strong>"12"</strong> to be converted to 
<strong>C</strong>.</p>

<pre><code>OneLine testString;
strcpy(testString, "12");

I'd like a way for me to convert testString to be "C"
</code></pre>

<p>How should I tackle this?</p>

<p>Thanks in advance.</p>
