using System;

​

public class Program

{

    public static void Main()

    {

        string str;

        char sp = ' ';

        int i, count;

        count = 0;

            Console.WriteLine("Please input a string: ");

        str = Console.ReadLine();

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

        {

        if (str[i].Equals(sp))

            {

                count++;

            }

        }

        Console.WriteLine("Number of spaces in the string is: " + count);

    }

}