Converting a Letter to a Number in C : <p>Alright so pretty simple, I want to convert a letter to a number so that a = 0, b = 1, etc. Now I know I can do</p>

<pre><code>number = letter + '0';
</code></pre>

<p>so when I input the letter 'a' it gives me the number 145. My question is, if I am to run this on a different computer or OS, would it still give me the same number 145 for when I input the letter 'a'?</p>
