title: Convert char to double
body: <p><br/>I am writing a code for data acquisition for my hardware.</p>
  
  <p>However, I need to find the average of the data that I have collected.</p>
  
  <p>Here's the problem, the acquired data is in <code>unsigned char</code> format and I need to convert it to <code>double</code> format. Furthermore, the data collected is in exponential form [1.789232E-05].</p>
  
  <p>Is there any possible way of converting a <code>unsigned char</code> to <code>double</code> then back again??</p>
  
  <p>I have got a <code>double j</code> and a <code>unsigned char a[200]</code><br/>The unsigned char consist of 1.789232E-05. How do I convert that data to double?</p>
  
  <p>Thank you!</p>