ABSTRACT
Not hard at all, unless, like your slippers, you suddenly find yourself in a situation where the fundamental functions aren't available. Perhaps you're writing in assembly language for a small microcontroller or you're programming using integer arithmetic to gain speed. Suddenly, the problem begins to loom larger. Because the fundamental functions are ... well ... fundamental, they tend to get used quite a few times in a given program. Get them wrong, or write them inefficiently, and performance is going to suffer.
