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/*
**************************************************************
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 07 *
* Author: Arash Partow (1999-2024) *
* URL: https://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. *
* https://www.opensource.org/licenses/MIT *
* SPDX-License-Identifier: 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",
i,
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;
}
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