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annotate examples/code/globaldemo.cc @ 20753:2f8500ca91d3

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eliminate error_state from example files * addtwomatrices.cc, celldemo.cc, embedded.cc, fortrandemo.cc, funcdemo.cc, globaldemo.cc, helloworld.cc, make_int.cc, paramdemo.cc, stringdemo.cc, structdemo.cc, unwinddemo.cc: Eliminate use of global error_state variable.
author John W. Eaton <jwe@octave.org>
date Sat, 03 Oct 2015 16:05:27 -0400
parents c8240a60dd01
children
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1 #include <octave/oct.h>
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2
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be41c30bcb44 Re-write documentation and all examples of dynamically linked functions.
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3 DEFUN_DLD (globaldemo, args, , "Global Demo")
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4 {
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5 octave_value retval;
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6
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7 if (args.length () != 1)
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8 print_usage ();
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9
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10 std::string s = args(0).string_value ();
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11
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12 octave_value tmp = get_global_value (s, true);
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13
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14 if (tmp.is_defined ())
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15 retval = tmp;
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16 else
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17 retval = "Global variable not found";
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18
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19 set_global_value ("a", 42.0);
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20
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21 return retval;
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22 }