How to read x amount of characters from a text file
<p>How can I read 20 characters of a text file progressively, for example, If i have a function read_next, calling it the first time would return the first 20 characters in a string, calling it the second time would return the next 20 characters of the file. Please note, I don't want to read the whole file into an array then break it up.</p>
