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1 // -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_DET_h) |
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25 #define octave_DET_h 1 |
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26 |
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27 #if defined (__GNUG__) |
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28 #pragma interface |
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29 #endif |
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30 |
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31 class ostream; |
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32 |
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33 class DET |
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34 { |
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35 friend class Matrix; |
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36 |
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37 public: |
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38 |
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39 DET (void); |
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40 |
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41 DET (const DET& a); |
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42 |
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43 DET& operator = (const DET& a); |
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44 |
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45 int value_will_overflow (void) const; |
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46 int value_will_underflow (void) const; |
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47 double coefficient (void) const; |
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48 int exponent (void) const; |
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49 double value (void) const; |
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50 |
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51 friend ostream& operator << (ostream& os, const DET& a); |
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52 |
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53 private: |
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54 |
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55 DET (const double *d); |
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56 |
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57 double det [2]; |
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58 }; |
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59 |
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60 inline DET::DET (void) |
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61 { |
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62 } |
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63 |
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64 inline DET::DET (const DET& a) |
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65 { |
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66 det[0] = a.det[0]; |
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67 det[1] = a.det[1]; |
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68 } |
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69 |
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70 inline DET& DET::operator = (const DET& a) |
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71 { |
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72 det[0] = a.det[0]; |
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73 det[1] = a.det[1]; |
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74 return *this; |
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75 } |
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76 |
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77 inline DET::DET (const double *d) |
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78 { |
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79 det[0] = d[0]; |
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80 det[1] = d[1]; |
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81 } |
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82 |
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83 #endif |
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84 |
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85 /* |
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86 ;;; Local Variables: *** |
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87 ;;; mode: C++ *** |
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88 ;;; page-delimiter: "^/\\*" *** |
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89 ;;; End: *** |
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90 */ |
