title: Working with stdin
body: <p>So I have to implement a program that works with a text file (<em>.txt</em>), which has been put to stdin like that: <code>./program [argumets] &lt;textfile.txt</code> without using such functions as fopen, fscanf, malloc, etc. and I have no idea how to do that. I need to work with characters in that text file (print them to screen, print max/min value, print sum, etc.), NOT with the file itself, so, maybe anyone got a hint? Thank you.</p>