Compiling a program for Mac OSX from a windows computer

I'm not sure what forum this question should go under, but hopefully I'm not throwing the forum into eternal chaos to post this here, so:

How can I compile a program that can run on the Mac OSX operating system without using Mac's sdk?
I want to compile a program using standard headers like <iostream.h> etc, but I need to compile it from my Windows machine.
Is that possible?

Sure, so long as it only uses standard headers, it should compile on any machine with a standard compiler.