% Copyright (c) 2010 Jerry James. % % Permission is hereby granted, free of charge, to any person obtaining a copy % of this software and associated documentation files (the "Software"), to deal % in the Software without restriction, including without limitation the rights % to use, copy, modify, merge, publish, distribute, sublicense, and/or sell % copies of the Software, and to permit persons to whom the Software is % furnished to do so, subject to the following conditions: % % The above copyright notice and this permission notice shall be included in % all copies or substantial portions of the Software. % % THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR % IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, % FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE % AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER % LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, % OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN % THE SOFTWARE. rem: THEORY BEGIN x : VAR int nzy : VAR nzint rem(x, nzy): int = IF (x >= 0 AND nzy > 0) THEN rem(nzy)(x) ELSIF (x >= 0 AND nzy < 0) THEN rem(-nzy)(x) ELSIF (x < 0 AND nzy > 0) THEN -rem(nzy)(-x) ELSE -rem(-nzy)(-x) ENDIF END rem