title: Is it better to use char or unsigned char array for storing raw data?
body: <p>When need to buffer in memory some raw data, for example from a stream, is it better to use an array of <code>char</code> or of <code>unsigned char</code>? I always used <code>char</code> but at work are saying it is better <code>unsigned char</code> and I don't know why.</p>