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60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
/*
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**************************************************************
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* C++ Mathematical Expression Toolkit Library *
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* *
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* Simple Example 6 *
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* Author: Arash Partow (1999-2017) *
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* URL: http://www.partow.net/programming/exprtk/index.html *
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* *
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* Copyright notice: *
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* Free use of the Mathematical Expression Toolkit Library is *
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* permitted under the guidelines and in accordance with the *
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* most current version of the MIT License. *
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* http://www.opensource.org/licenses/MIT *
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* *
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**************************************************************
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*/
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#include <cstdio>
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#include <string>
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#include "exprtk.hpp"
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template <typename T>
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void vector_function()
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{
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typedef exprtk::symbol_table<T> symbol_table_t;
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typedef exprtk::expression<T> expression_t;
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typedef exprtk::parser<T> parser_t;
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std::string expression_string =
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" for (var i := 0; i < min(x[],y[],z[]); i += 1) "
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" { "
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" z[i] := 3sin(x[i]) + 2log(y[i]); "
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" } ";
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T x[] = { T(1.1), T(2.2), T(3.3), T(4.4), T(5.5) };
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T y[] = { T(1.1), T(2.2), T(3.3), T(4.4), T(5.5) };
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T z[] = { T(0.0), T(0.0), T(0.0), T(0.0), T(0.0) };
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symbol_table_t symbol_table;
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symbol_table.add_vector("x",x);
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symbol_table.add_vector("y",y);
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symbol_table.add_vector("z",z);
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expression_t expression;
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expression.register_symbol_table(symbol_table);
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parser_t parser;
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parser.compile(expression_string,expression);
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expression.value();
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}
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int main()
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{
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vector_function<double>();
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return 0;
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}
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