Fixed Point Maths
version 5 by Michael Callaghan
Section 7 - Change the sign of a fixed point number
To decide which real number is the reverse/negation of (N - a real number):
let temp1 be 0 minus the whole part of N;
let temp2 be 0 minus the fractional part of N;
let result be the real number with whole part temp1 fractional part temp2;
decide on result.