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exprtk_simple_example_12.cpp
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1 /*
2  **************************************************************
3  * C++ Mathematical Expression Toolkit Library *
4  * *
5  * Simple Example 12 *
6  * Author: Arash Partow (1999-2019) *
7  * URL: http://www.partow.net/programming/exprtk/index.html *
8  * *
9  * Copyright notice: *
10  * Free use of the Mathematical Expression Toolkit Library is *
11  * permitted under the guidelines and in accordance with the *
12  * most current version of the MIT License. *
13  * http://www.opensource.org/licenses/MIT *
14  * *
15  **************************************************************
16 */
17 
18 
19 #include <cstdio>
20 #include <string>
21 
22 #include "exprtk.hpp"
23 
24 
25 template <typename T>
26 void bubble_sort()
27 {
28  typedef exprtk::symbol_table<T> symbol_table_t;
29  typedef exprtk::expression<T> expression_t;
30  typedef exprtk::parser<T> parser_t;
31 
32  std::string bubblesort_program =
33  " var upper_bound := v[]; "
34  " var swapped := false; "
35  " repeat "
36  " swapped := false; "
37  " for (var i := 0; i < upper_bound; i += 1) "
38  " { "
39  " for (var j := i + 1; j < upper_bound; j += 1) "
40  " { "
41  " if (v[i] > v[j]) "
42  " { "
43  " v[i] <=> v[j]; "
44  " swapped := true; "
45  " }; "
46  " }; "
47  " }; "
48  " upper_bound -= 1; "
49  " until (not(swapped) or (upper_bound == 0)); ";
50 
51  T v[] = { T(9.9), T(2.2), T(1.1), T(5.5), T(7.7), T(4.4), T(3.3) };
52 
53  symbol_table_t symbol_table;
54  symbol_table.add_vector("v",v);
55 
56  expression_t expression;
57  expression.register_symbol_table(symbol_table);
58 
59  parser_t parser;
60  parser.compile(bubblesort_program,expression);
61 
62  expression.value();
63 }
64 
65 int main()
66 {
67  bubble_sort<double>();
68  return 0;
69 }