CODEWITHSUNDEEP
c#stringrecursioncharacter
Sharmell Graham-Smith
Sharmell Graham-Smith

Reputation: 15

Creating a recursive method for counting a specific character in C#

I tried searching within Stackflow to help me answer my question but i did not have any luck since the ones i found are mainly in C++ or Java. I have recently learned Recursive so please pardon my ability to not understand some terms relating to it.

My question to who ever is able to answer is,what is missing in my code? I need my code to successfully count a specific character within a statement I put in a string. for now my code only prints out the statement.

public class CountCharacter
{
    public static void Main (string[] args)
    {
        string s = "most computer students like to play games";
        Console.WriteLine(s);
    }

    public static int countCharacters( string s, char c)
    {
        if (s.Length ==0)
            return 0;
        else if (s[0]==c)
            return 1+ countCharacters(s.Substring(1), 's');
        else
            return 0 + countCharacters (s.Substring(1),'s');
    }
}

Upvotes: 1

Views: 3550

Answers (2)

nahid
nahid

Reputation: 99

        static void Main(string[] args)
        {
            string s = " acv jk   ik  ";
            Console.WriteLine("Total space: {0}", CountSpace(s));
            Console.ReadLine();
        }

        private static int CountSpace(string s)
        {
            if (s.Length > 1)
                return s[0] == ' ' ? 1 + CountSpace(s.Substring(1, s.Length - 1)) : CountSpace(s.Substring(1, s.Length - 1));
            return s[0] == ' ' ? 1 : 0;
        }

Upvotes: 1

Jeroen van Langen
Jeroen van Langen

Reputation: 22083

Try this:

public class CountCharacter
{
    public static void Main (string[] args)
    {
        string s = "most computer students like to play games";
        Console.WriteLine(countCharacters(s, 's'));
    }

    public static int countCharacters( string s, char c)
    {
        if (s.Length == 0)
            return 0;
        else if (s[0] == c)
            return 1 + countCharacters(s.Substring(1), c);
        else
            return countCharacters(s.Substring(1), c);
    }
}

Upvotes: 3

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