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How about without an if statement?

Wow...you sure about that? All the time I've assumed that a switch statement used some sort of jump table array thing. (That was my reason why you couldn't do "real" tests in there, other than "is...

Oh, wow. I'd never thought of that. Hey, if you can do it, go ahead! :)

Well, I want functions that replace the ++ and >> operations, so naturally you shouldn't use ++ or >> in the function. :) (<< and -- are also no-good, but I don't think they'd help you anyway :))

Heh, that makes me think of one.. Come up with bitwise-shift and increment (or decrement) functions, using only the bitwise operations. (that doesn't include >> :))

You have no idea how much pain this problem gave me. :D

x = (a+b)(c+d)
y = ac
z = bd

Answer = y-z + (x-y-z)i

And here's the addition one: (I assumed unsigned numbers, but negatives are designed to work seamlessly with an adder, right?)



int fastadd(unsigned int a, unsigned int b)
{
int tmpa;

...

Ooh! Ooh! I got it! :D

Well, here's what I got. From here, the program is probably simple. :)

ax^2+bx+c -> x(ax+b) + c
ax^3+bx^2+cx+d -> x(x(ax+b) + c) + d
...and so on...

I could do it if there weren't any coefficients, does that count? :p

What's a real multiplication? Can I use division? :D

EDIT: Oh, I'm close. I know it. ;)

EDIT: Ah nevermind, I got nothing. :D