A function that mimics the behavior of the C library printf function

A short program that reads characters from the standard input until EOF (End Of File) is reached, printing each word on a new line. It considers a word to be any sequence of alphabetical characters, and treats any non-alphabetical character as a delimiter between words.

A simple calculator that performs basic arithmetic operations such as addition, subtraction, multiplication, division, and modulo. It reads expressions from the standard input (stdin) or the command line (in the case of text files), processes each expression, and outputs the result to the standard output (stdout).