There are some bugs in the borlandc.geo of Geos V2.0x, V2.5 and maybe V2.1. It doesn't occur in the newest version of NDO 3.0beta anymore and thus might be fixed in the GeoBook, too.
Bug 1: When comparing "float"-types, the order of two variables will be reversed.
Bug 2: When dividing an "int"-variable that has been casted to "float" with any other number, the order of two variables will be reversed.
(Wilfried Konczynski)