using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Linq;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.Activities.Rules;

namespace WorkflowConsoleApplication1
{
    public sealed partial class Workflow1 : SequentialWorkflowActivity
    {
        private int num;
        private Boolean firstTime = true;

        public Workflow1()
        {
            InitializeComponent();
        }

        private void WhileLoopCondition(object sender, ConditionalEventArgs e)
        {
            if (firstTime == true)
            {
                e.Result = true;
                firstTime = false;
            }
            else
            {
                if (num < 0)
                {
                    e.Result = true;
                }
                else
                {
                    e.Result = false;
                }
            }
        }

        private void readNum(object sender, EventArgs e)
        {
            Console.WriteLine("Please enter a positive number");
            num = Convert.ToInt32(Console.ReadLine());

        }

        private void Zero(object sender, ConditionalEventArgs e)
        {
            if (num == 0)
            {
                e.Result = true;
            }
            else
            {
                e.Result = false;
            }
        }

        private void PrintResultForZero(object sender, EventArgs e)
        {
            Console.WriteLine("0! is 1");
        }

        private void PrintResult(object sender, EventArgs e)
        {
            int fac = 1;
            for (int i = 1; i < num+1; i++)
            {
               fac *= i;
            }
            Console.WriteLine(num + "! is " + fac);

        }
    }

}