Function that takes a positive integer N
and returns the sum of the bits in the binary representation. For example bits(7)
is 3
and bits(8)
is 1
. Direct and tail-recurive versions.
Calculates perimeter, area and enclosing rectangle for different types shape:
{ circle, { X, Y }, R }
: circle (centre, radius){ rectangle, { X, Y }, W, H }
rectangle (centre, width, height)