using System;

using System.Collections.Generic;

using org.mariuszgromada.math.mxparser;

​

public class Program

{

    public static void Main()

    {

        DateTime localDate = DateTime.Now;

        var codeLine = "x=3";

        var codeline2 = "x + 1";

        // ========================================================================================

        // -- User Expression Variable Arguments

        var argList = new List<Argument>();

        var ExpressionVariableArgs = new Dictionary<string, double>();

        ExpressionVariableArgs.Add("x", 1);

        ExpressionVariableArgs.Add("y", 2);     

        ExpressionVariableArgs.Add("z", 10);

        // ----------------------------------------------------------------------------------------

        // -- Inline Expressionion Variable Arguments (initialize with zeros)

        var InlineExpressionVariableArgs = new List<string>();

        InlineExpressionVariableArgs.Add("x1=10");

        InlineExpressionVariableArgs.Add("y1=20");              

        // ========================================================================================

        // -- Create Argument List from each Expression Variables

        foreach (var eArg in ExpressionVariableArgs)

        {

            argList.Add(new Argument(eArg.Key + "=" + eArg.Value));

        }

        // -- Create Argument List from each Inline Expression Variables 

​

        foreach(var eArg in InlineExpressionVariableArgs){

            argList.Add(new Argument(eArg));

        }               

​

        // ========================================================================================

        // BEGIN CALCULATIONS   

        // ========================================================================================

        var exp = new Expression(codeLine);

        // --  Add all the user Arguments (with values) to the Expression

        foreach (Argument arg in argList){  

            exp.addArguments(arg);

        }       

        Console.WriteLine(@"#004 :: {0}:{1}:{2} - Expression String: {3}", localDate.Hour, localDate.Minute, localDate.Second, exp.getExpressionString());

        // -- Syntac Checking           

        exp.checkSyntax();

        if (exp.getSyntaxStatus()){

            Console.WriteLine(@"#005 :: {0}:{1}:{2} - Syntax check found no errors", localDate.Hour, localDate.Minute, localDate.Second);

        } else {

            var syntaxResult = exp.getErrorMessage();

            Console.WriteLine(@"#006 :: {0}:{1}:{2} - Syntax check found error(s): {3}{4}", localDate.Hour, localDate.Minute, localDate.Second, System.Environment.NewLine, syntaxResult);

        }

        // -- Calclute the Expression

        try {

            var calculationResult = exp.calculate();

            exp.setExpressionString(codeline2);

            calculationResult = exp.calculate();

            if (!Double.IsNaN(calculationResult)){

                Console.WriteLine(@"#007 :: {0}:{1}:{2} - Calculation Success!!! Result: {3}", localDate.Hour, localDate.Minute, localDate.Second, calculationResult);

            } else {

                var err =exp.getErrorMessage();

                Console.WriteLine(@"#008 :: {0}:{1}:{2} - Calculation Failed!!! Message: {3}{4}", localDate.Hour, localDate.Minute, localDate.Second, System.Environment.NewLine, err);

            }

        } 

        catch(Exception ex)

        {

            var err =exp.getErrorMessage();

            Console.WriteLine(@"#999 :: {0}:{1}:{2} - Exception on calculation: {3}", localDate.Hour, localDate.Minute, localDate.Second, ex.Message);

        }

​

    }

}