using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApplication17

{

   public class Program

    {

        public static void CountWords(string str)

        {

            int i=0,count=0;

                    for(i=0;i<str.Length;i++)

                    {

                        if(str[i]==' ')

                        count++;      

                    }

            Console.WriteLine("the string is "+count);

        }

    }

    public class array1

        {

            public static void Main(String[] args)

            {

                string str= "HI WHAT'S UP?";

                 Program.CountWords(str);

            }

        }

    }

​