Answer to Question #244610 in C# for jeanne

Question

Using visual studio (C#) create a program, name it PRGYOURNAMEFA1, that implements a search and replace function recursively. Your program should allow a user to enter a string , a substring to be replaced in the entered string and a character/s to replace the found substring 

Program Structure

1. A main class that implements the logic of the program – name this class TestSearchReplace

2. Add a class named SearchReplace to the main class with two methods, including:

a. SearchSubstring()- return method

b. ReplaceSubString() - void method

The two method should be called using an object in the main class. DONT CREATE THE TWO METHODS IN THE MAIN CLASS

Answer 1

using System;
using System.IO;
using System.Collections.Generic;


namespace App
{
    class TestSearchReplace
    {
        class SearchReplace
        {
            public int SearchSubstring(string message, string subString)
            {
                int messageSize = message.Length;
                int subStringSize = subString.Length;
                if (messageSize == 0 || messageSize < subStringSize)
                {
                    return 0;
                }
                if (message.Substring(0, subStringSize).Equals(subString))
                {
                    return SearchSubstring(message.Substring(subStringSize - 1), subString) + 1;
                }
                return SearchSubstring(message.Substring(subStringSize - 1), subString);
            }


            public void ReplaceSubString(ref string message, string subString, string characterReplace)
            {
                if (message.Contains(subString))
                {
                    message=message.Replace(subString, characterReplace);
                    ReplaceSubString(ref message, subString, characterReplace);
                }
            }
        }


        static void Main(string[] args)
        {
            Console.Write("Enter string: ");
            string message = Console.ReadLine();
            Console.Write("Enter substring: ");
            string subString = Console.ReadLine();
            Console.Write("Enter a new string to replace: ");
            string characterReplace = Console.ReadLine();
           
            SearchReplace SearchReplace = new SearchReplace();
            int n=SearchReplace.SearchSubstring(message, subString);
            if (n > 0)
            {
                Console.WriteLine("\nA new string after replacing: ");
                SearchReplace.ReplaceSubString(ref message, subString, characterReplace);
                Console.WriteLine(message);
            }
            else {
                Console.WriteLine("\nSubstring does not exist.");
            }




            Console.ReadLine();
        }






    }
}