using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;
 
namespace огыеагт
{
        class Program
        {
 
                static void Main(string[] args)
                {
 
                        ParameterExpression value = Expression.Parameter(typeof(double), "value");
                        ParameterExpression value2 = Expression.Parameter(typeof(double), "value2");
 
                        ParameterExpression result = Expression.Parameter(typeof(double), "result");
                        ParameterExpression mainResult = Expression.Variable(typeof(double), "mainResult");

 
                        LabelTarget label = Expression.Label(typeof(double));
 
                        BlockExpression block = Expression.Block(
                                new[] { result,mainResult }, 
                                Expression.Assign(mainResult, Expression.Constant(0.0)),
                                Expression.Assign(result, Expression.Constant(1.0)),
 
                                Expression.Loop(
                                        Expression.IfThenElse(
                                                Expression.GreaterThan(value2, Expression.Constant(0.0)),

                                                Expression.AddAssign(mainResult,
                                                    Expression.MultiplyAssign(result,
                                                        Expression.Divide(value,
                                                            Expression.PostDecrementAssign(value2)
                                                        )
                                                    )
                                                ),

                                                Expression.Break(label, mainResult)
                                        ),
                                        label
                                )
                        );
 
                        for (double j = 0.1; j <= 1.01; j += 0.05)
                        {
                                int i = 0;
                                double sum = 1, res = 0;
                                while (sum > 0.0004)
                                {
                                        sum = Expression.Lambda<Func<double, double, double>>(block, value, value2).Compile()(j, 2 * i + 1);
                                        i++;
                                        res += sum;
                                }
                                double y = 0;
                                y = (Math.Pow(Math.E, j) - Math.Pow(Math.E, -j)) / 2;
                                Console.WriteLine("{0:f2}     {1:f4}     {2:f4}", j, res, y);
                        }
                        Console.ReadKey();
                }
        }
}