Programming

I'm not sure that's K&R style. In various places you have things where the thing that follows a for, while or if isn't indented, and as far as I'm aware, K&R indents religiously. K&R omits braces on single statements, sure, but that statement is nonetheless indented from the parent keyword.

e.g. you have things like:

while (condition)
statement;

and

for(x;y;z) {
if (condition) {
    statement1;
    statement2;
}
}

Which I'm pretty sure should be:

while (condition)
    statement;

and

for(x;y;z) {
    if (condition) {
        statement1;
        statement2;
    }
}

respectively. The idea is that you can theoretically trace the keyword down to its closing brace, assuming there is one.