vladimir-novick / rpnlib

Reverse Polish Notation (RPN) Library. This is a method for representing arithmetical expressions in which the operator symbol is placed after the arguments being operated on.

RPNLib

Reverse Polish Notation (RPN) Calculator Library

Reverse Polish notation (RPN) is a method for representing arifmetical expressions in which the operator symbol is placed after the arguments being operated on. Polish notation, in which the operator comes before the operands, was invented in the 1920s by the Polish mathematician Jan Lucasiewicz.

Using:

			String sourceString = "((15 / (7 - (1 + 1))) * 3) - (2 + (1 + 1)) ";
			var compiler = new RPNExpression(sourceString);
			var rezult = compiler.Calculate().ToString();

With arguments:

			var compiler = new RPNExpression("4/12*100+(A*B)");
			var RPNString = compiler.Prepare();
			List<RPNArguments> arguments = new List<RPNArguments>();
			arguments.Add(new RPNArguments("A", 2));
			arguments.Add(new RPNArguments("B", 7));
			var rezult = compiler.Calculate(arguments).ToString();

With functions:

			 String sourceString = "ACOS(-(0.5+0.5)) -20 +5";
			 var compiler = new RPNExpression(sourceString);
			 var rezult = compiler.Calculate().ToString();

Mathematical notations:

Symbol	Symbol Name	Definition	Example
( )	parentheses	calculate expression inside first	2 × (3+5) = 16
+	plus sign	addition	1 + 1 = 2
−	minus sign	subtraction	2 − 1 = 1
*	asterisk	multiplication	2 * 3 = 6
/	division slash	division	6 / 2 = 3
÷	division sign / obelus	division	6 ÷ 2 = 3
^	Exponentiation sign	exponent	2 ^ 3 = 8
%	percent	1% = 1/100	10% × 30 = 3

Logical notations:

Symbol	Symbol Name	Definition	Example
=	Equalent	Equalent	5 = 5
==	Equalent	Equalent	5 == 5
>	strict inequality	greater than	5 > 4 5 is greater than 4
<	strict inequality	less than	4 < 5 4 is less than 5
≥	inequality	greater than or equal to	5 ≥ 4, x ≥ y means x is greater than or equal to y
>=	inequality	greater than or equal to	5 >= 4, x >= y means x is greater than or equal to y
≤	inequality	less than or equal to	4 ≤ 5, x ≤ y means x is less than or equal to y
<=	inequality	less than or equal to	4 <= 5, x <= y means x is less than or equal to y
||	Or	Logical OR	5 = x|| 4 = y
&&	And	Logical AND	5 = x && 4 = x
!	Not	Logical NOT	!(5 = x)

Functions:

Functions	Definition
If(x,y,z)	x - logical expression . if true next expression is executed
ACos(x)	Arccosine function.
ASin(x)	returns the Inverse Sin
ATan(x)	Arctan(x), tan-1(x), inverse tangent function.
Cos(x)	Cosine function.
Cosh(x)	Inverse hyperbolic cosine
Log(x)	Natural logarithm
Log10(x)	Logarithm 10
Sin(x)	sin(x), sine function.
Sinh(x)	Inverse hyperbolic sine
Sqrt(x)	Square Root
Tan(x)	tangent function.
Tanh(x)	Hyperbolic tangent
PI()	Number Pi Mathematical Constant
Now()	Current Date and Time
Date()	Currentn Date
Time()	Current Time
Day()	Current Day
Month()	Current Month
Year()	Current Year
Abs(x)
Round(x)
Random()

where "x" - constant or mathematical expression