Interview Hello World explanation

Question

This classic ioccc entry is a Hello World program written in C. Can anyone please provide an explanation of how it works?

Original code (syntax highlighting intentionall

Answer 1

Yet another interview question that seems to reflect more on the interviewer than the interviewee. Key issues here: * j is always 0 (('-' - '-') == 0) * p is always 1 (('/' / '/') == 1) * i (in the read function) is (i++ + "hello world") == the i'th character in hello world (then increment i)

Thus the read function becomes

read(0, NextChar, 1)
{
  write(1, NextChar , 1);
}

The only other bit is the commutativity of the []operator in the for loop.

Understanding and parsing this kind of code is really valueless imho.