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

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Arash Partow
2013-07-17 08:21:06 +10:00
parent 45a1a275dc
commit b369bc342c
3 changed files with 48 additions and 18 deletions
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readme.txt
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@ -23,6 +23,7 @@ operations, functions and processes:
(2) Trigonometry: acos, asin, atan, atan2, cos, cosh, cot, csc,
deg2grad, deg2rad, grad2deg, hypot, rad2deg,
sec, sin, sinh, tan, tanh
(3) Equalities &
Inequalities: =, ==, <>, !=, <, <=, >, >=
@ -47,21 +48,21 @@ The following is a short listing of the types of mathematical
expressions that can be parsed and evaluated using the ExprTk library.
(01) sqrt(1 - (x^2))
(02) clamp(-1,sin(2 * pi * x) + cos(y / 2 * pi),+1)
(03) sin(2 * x)
(02) clamp(-1, sin(2 * pi * x) + cos(y / 2 * pi), +1)
(03) sin(2.34e-3 * x)
(04) if(((x + 2) == 3) and ((y + 5) <= 9),1 + w, 2 / z)
(05) inrange(-2,m,+2) == if(({-2 <= m} and [m <= +2]),1,0)
(06) ({1/1}*[1/2]+(1/3))-{1/4}^[1/5]+(1/6)-({1/7}+[1/8]*(1/9))
(07) a * exp(2 * t) + c
(08) z := x + sin(2 * pi / y)
(09) u := 2 * (pi * z) / (w := x + cos(y / pi))
(07) a * exp(2.2 / 3.3 * t) + c
(08) z := x + sin(2.567 * pi / y)
(09) u := 2.123 * (pi * z) / (w := x + cos(y / pi))
(10) 2x + 3y + 4z + 5w == 2 * x + 3 * y + 4 * z + 5 * w
(11) 3(x + y) / 2 + 1 == 3 * (x + y) / 2 + 1
(12) (x + y)3 + 1 / 4 == (x + y) * 3 + 1 / 4
(13) (x + y)z + 1 / 2 == (x + y) * z + 1 / 2
(14) (sin(x/pi)cos(2y) + 1)==(sin(x / pi) * cos(2 * y) + 1)
(11) 3(x + y) / 2.9 + 1.234e+12 == 3 * (x + y) / 2.9 + 1.234e+12
(12) (x + y)3.3 + 1 / 4.5 == (x + y) * 3.3 + 1 / 4.5
(13) (x + y)z + 1.1 / 2.7 == (x + y) * z + 1.1 / 2.7
(14) (sin(x / pi) cos(2y) + 1) == (sin(x / pi) * cos(2 * y) + 1)
(15) 25x^5 - 35x^4 - 15x^3 + 40x^2 - 15x + 1
(16) if (avg(x,y) <= x + y, x - y, x * y) + 2 * pi / x
(16) if (avg(x,y) <= x + y, x - y, x * y) + 2.345 * pi / x
(17) fib_i := fib_i + (x := y + 0 * (fib_i := x + (y := fib_i)))
(18) while (x <= 100) { x := x + 1 }
(19) x <= 'abc123' and (y in 'AString') or ('1x2y3z' != z)
@ -103,7 +104,7 @@ include path (e.g: /usr/include/).
[07 - COMPILER COMPATIBILITY]
(*) GNU Compiler Collection (4.1+)
(*) Intel<EFBFBD> C++ Compiler (9.x+)
(*) Intel C++ Compiler (9.x+)
(*) Clang/LLVM (1.1+)
(*) PGI C++ (10.x+)
(*) Microsoft Visual Studio C++ Compiler (8.1+)
@ -171,7 +172,7 @@ include path (e.g: /usr/include/).
+----------+---------------------------------------------------------+
| mor | Multi-input logical OR, True if at least one of the |
| | inputs are true. Left to right short-circuiting of |
| | expressions. (eg: mand(x > y,z < w,u or v,w and x)) |
| | expressions. (eg: mor(x > y,z < w,u or v,w and x)) |
+----------+---------------------------------------------------------+
| nand | Logical NAND, True only if either x or y is false. |
| | (eg: x nand y) |