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

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Arash Partow
2014-01-03 21:42:54 +11:00
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@ -20,9 +20,9 @@ operations, functions and processes:
logn, max, min, mul, nequal, root, round,
roundn, sgn, sqrt, sum, trunc
(2) Trigonometry: acos, asin, atan, atan2, cos, cosh, cot, csc,
deg2grad, deg2rad, grad2deg, hypot, rad2deg,
sec, sin, sinh, tan, tanh
(2) Trigonometry: acos, acosh, asin, asinh, atan, atanh, atan2,
cos, cosh, cot, csc, deg2grad, deg2rad, grad2deg,
hypot, rad2deg, sec, sin, sinh, tan, tanh
(3) Equalities &
Inequalities: =, ==, <>, !=, <, <=, >, >=
@ -272,13 +272,19 @@ include path (e.g: /usr/include/).
+----------+---------------------------------------------------------+
| acos | Arc cosine of x expressed in radians. Interval [-1,+1] |
+----------+---------------------------------------------------------+
| acosh | Inverse hyperbolic cosine of x expressed in radians. |
+----------+---------------------------------------------------------+
| asin | Arc sine of x expressed in radians. Interval [-1,+1] |
+----------+---------------------------------------------------------+
| asinh | Inverse hyperbolic sine of x expressed in radians. |
+----------+---------------------------------------------------------+
| atan | Arc tangent of x expressed in radians. Interval [-1,+1] |
+----------+---------------------------------------------------------+
| atan2 | Arc tangent of (x/y) expressed in radians. [-pi,+pi] |
| | eg: atan2(x,y) |
+----------+---------------------------------------------------------+
| atanh | Inverse hyperbolic tangent of x expressed in radians. |
+----------+---------------------------------------------------------+
| cos | Cosine of x. |
+----------+---------------------------------------------------------+
| cosh | Hyperbolic cosine of x. |
@ -408,7 +414,30 @@ A structure that holds an AST for a specified expression and is used
to evaluate said expression. If a compiled Expression uses variables
or user defined functions, it will then also have an associated Symbol
Table, which will contain references to said variables, functions et
al.
al. An example AST structure for the denoted expression is as follows:
Expression: z := (x + y^-2.345) * sin(pi / min(w - 7.3,v))
[Root]
|
[Assignment]
________/ \_____
/ \
Variable(z) [Multiply]
____________/ \___________
/ \
/ [Unary-Func(sin)]
[Addition] |
____/ \____ [Division]
/ \ ___/ \___
Variable(x) [Power] / \
______/ \______ Constant(pi) [Binary-Func(min)]
/ \ ___/ \___
Variable(y) [Negate] / \
| [Subtract] Variable(v)
Constant(2.345) ____/ \___
/ \
Variable(w) Constant(7.3)
(3) Parser
A structure which takes as input a string representation of an