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exprtk/exprtk_simple_example_06.cpp at master · ArashPartow/exprtk · GitHub
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/*
**************************************************************
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 06 *
* Author: Arash Partow (1999-2025) *
* 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
vector_function
()
{
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 =
"
for (var i := 0; i < min(x[], y[], z[]); i += 1)
"
"
{
"
"
z[i] := 3sin(x[i]) + 2log(y[i]);
"
"
}
"
;
T x[] = {
T
(
1.1
),
T
(
2.2
),
T
(
3.3
),
T
(
4.4
),
T
(
5.5
) };
T y[] = {
T
(
1.1
),
T
(
2.2
),
T
(
3.3
),
T
(
4.4
),
T
(
5.5
) };
T z[] = {
T
(
0.0
),
T
(
0.0
),
T
(
0.0
),
T
(
0.0
),
T
(
0.0
) };
symbol_table_t
symbol_table;
symbol_table.
add_vector
(
"
x
"
,x);
symbol_table.
add_vector
(
"
y
"
,y);
symbol_table.
add_vector
(
"
z
"
,z);
expression_t
expression;
expression.
register_symbol_table
(symbol_table);
parser_t
parser;
parser.
compile
(expression_string,expression);
expression.
value
();
}
int
main
()
{
vector_function<
double
>();
return
0
;
}
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