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

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Arash Partow
2014-04-19 21:10:15 +10:00
parent f6a56d8048
commit afc7c074fa
6 changed files with 374 additions and 235 deletions
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3
exprtk_simple_example_02.cpp
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@ -32,7 +32,9 @@ void square_wave()
" (1/17)*sin(34*pi*f*t)+(1/19)*sin(38*pi*f*t)+"
" (1/21)*sin(42*pi*f*t)+(1/23)*sin(46*pi*f*t)+"
" (1/25)*sin(50*pi*f*t)+(1/27)*sin(54*pi*f*t))";
static const T pi = T(3.14159265358979323846);
T f = pi / T(10);
T t = T(0);
T a = T(10);
@ -50,6 +52,7 @@ void square_wave()
parser.compile(expr_string,expression);
const T delta = (T(4) * pi) / T(1000);
for (t = (T(-2) * pi); t <= (T(+2) * pi); t += delta)
{
T result = expression.value();