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annotate examples/code/standalonebuiltin.cc @ 20794:e5986cba4ca8

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new octave_value::cell_value method with optional error message * ov.h, ov.cc (octave_value::cell_value): New method. * ov-base.h, ov-base.cc (octave_base_value::cell_value): New default method. * ov-cell.h, ov-cell.cc (octave_cell::cell_value): New method.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Oct 2015 14:41:49 -0400
parents 0e1f5a750d00
children
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3341d2f1e5db Document calling DEFUN functions in C++.
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1 #include <iostream>
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2 #include <octave/oct.h>
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3 #include <octave/builtin-defun-decls.h>
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4
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5 int
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6 main (void)
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7 {
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8 int n = 2;
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9 Matrix a_matrix = Matrix (n, n);
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11 for (octave_idx_type i = 0; i < n; i++)
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12 for (octave_idx_type j = 0; j < n; j++)
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13 a_matrix(i,j) = (i + 1) * 10 + (j + 1);
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14
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15 std::cout << "This is a matrix:" << std::endl
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16 << a_matrix << std::endl;
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17
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18 octave_value_list in;
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19 in(0) = a_matrix;
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20
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21 octave_value_list out = Fnorm (in, 1);
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22 double norm_of_the_matrix = out(0).double_value ();
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23
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24 std::cout << "This is the norm of the matrix:" << std::endl
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25 << norm_of_the_matrix << std::endl;
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26
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27 return 0;
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28 }