exprtk/exprtk_simple_example_07.cpp at master · losttem/exprtk · GitHub

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**************************************************************

* C++ Mathematical Expression Toolkit Library *

* *

* Simple Example 7 *

* Author: Arash Partow (1999-2022) *

* URL: http://www.partow.net/programming/exprtk/index.html *

* *

* Copyright notice: *

* Free use of the Mathematical Expression Toolkit Library is *

* permitted under the guidelines and in accordance with the *

* most current version of the MIT License. *

* http://www.opensource.org/licenses/MIT *

* *

**************************************************************

#include <cstdio>

#include <string>

#include "exprtk.hpp"

template <typename T>

void logic()

{

typedef exprtk::symbol_table<T> symbol_table_t;

typedef exprtk::expression<T> expression_t;

typedef exprtk::parser<T> parser_t;

const std::string expression_string = "not(A and B) or C";

symbol_table_t symbol_table;

symbol_table.create_variable("A");

symbol_table.create_variable("B");

symbol_table.create_variable("C");

expression_t expression;

expression.register_symbol_table(symbol_table);

parser_t parser;

parser.compile(expression_string,expression);

printf(" # | A | B | C | %s\n"

"---+---+---+---+-%s\n",

expression_string.c_str(),

std::string(expression_string.size(),'-').c_str());

for (int i = 0; i < 8; ++i)

{

symbol_table.get_variable("A")->ref() = T((i & 0x01) ? 1 : 0);

symbol_table.get_variable("B")->ref() = T((i & 0x02) ? 1 : 0);

symbol_table.get_variable("C")->ref() = T((i & 0x04) ? 1 : 0);

const int result = static_cast<int>(expression.value());

printf(" %d | %d | %d | %d | %d \n",

static_cast<int>(symbol_table.get_variable("A")->value()),

static_cast<int>(symbol_table.get_variable("B")->value()),

static_cast<int>(symbol_table.get_variable("C")->value()),

result);

}

int main()

{

logic<double>();

return 0;

}

exprtk/exprtk_simple_example_07.cpp at master · losttem/exprtk · GitHub

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