Simple Math Interpreter

It is a base library for who wants to implement such functionality that, read a specific formula, apply with variable names (maybe from db or sth) and execute result.

Supported Functions/Operators

• Standart operators as addition(+), subtruction(-), multiplication(*), division(/),modulus (%)
• Basic Trigonometric Functions (sin,cos,tan,cot)
• Absolute,Exp,Log,Ln,Power,Round...

With Plugin Adaptability!

• Just write your own library by implementing "IMathOperator" interface or "IMathFunction" interface, and inherit "MathMetaBase" abstract class and voila! BaseInterpreter loads your operators and/or functions on-the-fly!

You can also:

• Define a variable, define a constant. In this case, your variables or constants should inherit "KeyNumberPair" class.
• For further implementation futures, you would consider inheriting "PredefinedConstant" or "KnownVariable" classes.

You need to end your library name with "[Something]plugin.dll"

Sample usage:

First create a simple interpreter from base class.

 public class TestInterpreter:BaseInterpreter
    {
        public static IMathInterpreter Create()
        {
            return new TestInterpreter();
        }
    }

then call for parse method by creating a math expression in string.

var exp = "(cosd(deg(pi/4)))pow(9999)";
double result = TestInterpreter.Create().Parse(exp);
// result = 673.59121423765407

As of the Origin of Project implements interpreter as:

• ....) (argument_2) (argument_1) function (argument_0)

You should write your custom multi-argument function's expressions such.

As you can see, I simply show how to write a plug-in, consider "f_CalculateDepositInterest" class:

string exp = "(interest)(deposit)dinterest(amountofdays)"; // function is dinterest
double result = interpreter.Parse(exp);
// since we created interest,deposit and amountofdays "KnownVariable"s we can use them in expression. 
// or we can write our own values as:
string exp1 = "(8.25)(125000)dinterest(365)";
double result1 = interpreter.Parse(exp1);
// remember, amountofdays is first argument, deposit is second and interest is third!

you would want to take a look at Origin of Project

License

GNU General Public License

Free Software, Hell Yeah!