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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

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Arash Partow
2020-01-01 00:00:00 +00:00
parent f32d2b4bbb
commit e67b22afd9
25 changed files with 3701 additions and 1792 deletions
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10
exprtk_simple_example_01.cpp
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@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 1 *
* Author: Arash Partow (1999-2018) *
* Author: Arash Partow (1999-2020) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
@ -18,6 +18,7 @@
#include <cstdio>
#include <string>
#include "exprtk.hpp"
@ -28,7 +29,8 @@ void trig_function()
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
std::string expression_string = "clamp(-1.0,sin(2 * pi * x) + cos(x / 2 * pi),+1.0)";
const std::string expression_string =
"clamp(-1.0,sin(2 * pi * x) + cos(x / 2 * pi),+1.0)";
T x;
@ -44,8 +46,8 @@ void trig_function()
for (x = T(-5); x <= T(+5); x += T(0.001))
{
T y = expression.value();
printf("%19.15f\t%19.15f\n",x,y);
const T y = expression.value();
printf("%19.15f\t%19.15f\n", x, y);
}
}