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/* ASCEND modelling environment |
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Copyright (C) 1990, 1993, 1994 Thomas Guthrie Epperly |
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Copyright (C) 2006 Carnegie Mellon University |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2, or (at your option) |
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any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, |
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Boston, MA 02111-1307, USA. |
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*//** |
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@file |
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Fraction module for ASCEND. |
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|
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Requires: |
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#include <utilities/ascConfig.h> |
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*//* |
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by Tom Epperly |
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8/18/89 |
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Version: $Revision: 1.5 $ |
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Version control file: $RCSfile: fractions.h,v $ |
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Date last modified: $Date: 1997/07/18 12:29:47 $ |
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Last modified by: $Author: mthomas $ |
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*/ |
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|
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#ifndef ASC_FRACTIONS_H |
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#define ASC_FRACTIONS_H |
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|
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/** The type of a fraction numerator or denominator. */ |
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#define FRACPART short |
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/** The maximum FRACPART value. */ |
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#define FRACMAX SHRT_MAX |
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|
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/** Fraction data structure. */ |
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struct fraction { |
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FRACPART numerator; |
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FRACPART denominator; |
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}; |
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|
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ASC_DLLSPEC struct fraction CreateFraction(short n, short d); |
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/**< |
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* Create a fraction (n/d). |
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* Specify the numerator (n) and denominator (d). |
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*/ |
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|
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extern struct fraction Simplify(struct fraction f); |
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/**< |
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* Simplify the fraction. This forces the denominator to be >= 0; so |
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* if the fraction is negative, the numerator will be negative. |
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*/ |
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|
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#define Numerator(f) ((f).numerator) |
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/**< |
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* Return the numerator of f as a FRACPART. |
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*/ |
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|
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#define Denominator(f) ((f).denominator) |
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/**< |
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* Return the denominator of f as a FRACPART. |
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*/ |
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|
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extern struct fraction AddF(struct fraction f1, struct fraction f2); |
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/**< |
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* Return f1+f2 simplified. |
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*/ |
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|
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extern struct fraction SubF(struct fraction f1, struct fraction f2); |
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/**< |
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* Return f1-f2 simplified. |
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*/ |
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|
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extern struct fraction MultF(struct fraction f1, struct fraction f2); |
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/**< |
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* Return f1*f2 simplified. |
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*/ |
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|
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extern struct fraction DivF(struct fraction f1, struct fraction f2); |
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/**< |
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* Return f1/f2 simplified. |
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*/ |
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|
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extern int CmpF(struct fraction f1, struct fraction f2); |
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/**< |
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* Return -1,0,1 if f1 is <,=, or > than f2 respectively. |
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*/ |
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|
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extern struct fraction NegateF(struct fraction f); |
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/**< |
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* Returned fraction equal -f. |
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*/ |
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|
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#endif /* ASC_FRACTIONS_H */ |
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