Development C# - If and Arrays problem

Hello guys,

I need some help with an assignment at uni, basically option 1 on my menu is ment to offer the user a single entry in the array, and then exit, so it must find an empty space (XXXXXX) and fill it up, but if it has none it has to inform the user.

Part of the assignment is that it must be a 2D array, and empty blocks must be XXXXXX, and yes i know its horrible.

Code is below,

Thank you.

DT.

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ArraysAssessment
{
    class Program
    {
            //Declare the Menu Selection 
        public static int Selection;
        public static int index;
            //String for an empty entry
        public static string empty = "XXXXXX";
            //Initialise the Array
        public static string[,] book = new string[20, 2];

        static void Main(string[] args)
        {

            defaultFill();

            do
            {

                //Call the menu system
                MainMenu();


                if (Selection == 1)
                {
                                                                        // NOT WORKING SELECTION = 1, LOOPS THEN DOES THE ELSE
                
                    for (int i = 0; i < book.Length / 2; i++)
              
                        //while (true)
                        if (book[i, 0] == empty)
                        {

                                Console.WriteLine("Please enter the Name in the format: Lastname, ForeName");
                                book[i, 0] = Convert.ToString(Console.ReadLine());
                                Console.WriteLine("");
                                Console.WriteLine("Please Enter the Address in the format: Number, Road Name, Town Name");
                                book[i, 1] = Convert.ToString(Console.ReadLine());
                                Console.WriteLine("");
                                Console.WriteLine("The name is: " + book[i, 0]);
                                Console.WriteLine("The Address is: " + book[i, 1]);
                                Console.WriteLine("Thank You for inputting the data Press Return to go to the Main Menu");
                                Console.ReadLine(); 
                                i = book.Length / 2;
                             }
                    

                        
                       else if(book[i, 0] != empty)
                        {
                            Console.WriteLine("Sorry there is no space");
                            Console.WriteLine("Press Return to go to the Main Menu");
                            Console.ReadLine();


                        }

                    //break;
                    Console.WriteLine("Choice 1 here");

                    //Fill in

                }

                else if (Selection == 2)
                {
                    menuOption2();
                }


                //Display the book
                else if (Selection == 3)
                {
                    menuOption3();
                }

                else
                {
                    Console.WriteLine("Program Ended, Press Return to Close");


                }

            } while (Selection != 6);
                Console.ReadLine();
        }

        private static void menuOption3()
        {

            for (int i = 0; i < book.Length / 2; i++)
            {
                Console.WriteLine("____________________________________________");
                Console.WriteLine((i + 1) + " | " + book[i, 0] + " | " + book[i, 1]);

            }
            Console.WriteLine("Press Return to go to the Main Menu");
            Console.ReadLine();
        }

        private static void menuOption2()
        {
            // Ask for the Address Index
            Console.WriteLine("Please Enter The Address Index");
            index = Convert.ToInt32(Console.ReadLine());

            // Index Starts at 1, but array at 0 so taking the difference 
            index = (index - 1);

            // Write to Address Book.
            book[index, 0] = empty;
            book[index, 1] = empty;

            Console.WriteLine("Choice 2 here");
        }

        private static void defaultFill()
        {
            //Fill the Address book with 'XXXXXX' for blank entrys

            for (int i = 0; i < book.Length / 2; i++)
            {
                book[i, 0] = empty;
                book[i, 1] = empty;
            }
        }

        public static void MainMenu()
        {

            //Clear Everything above
            Console.Clear();
            Console.WriteLine("Please Select One of the following options:");
            Console.WriteLine("_________________________________");
            Console.WriteLine("| 1. | Add an Entry             |");
            Console.WriteLine("| 2. | Delete an Entry          |");
            Console.WriteLine("| 3. | Print Book to Screen     |");
            Console.WriteLine("| 6. | Exit The Address Book    |");
            Console.WriteLine("|_______________________________|");
            //Store the selection
            Selection = Convert.ToInt32(Console.ReadLine());
            //Clear the menu
            Console.Clear();

        }
    }
}

 

What problem are you having exactly? Are you getting unexpected results or are you having difficulty implementing the logic?

 

uhm yeah! working code - took me a half hour.. haven't programmed in a while now..

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ArraysAssessment
{
    class Program
    {
        //Declare the Menu Selection 
        public static int Selection;
        public static int index;
        public static bool booksfull = false;
        //String for an empty entry
        public static string empty = "XXXXXX";
        //Initialise the Array
        public static string[,] book = new string[20, 2];

        static void Main(string[] args)
        {

            defaultFill();

            do
            {

                //Call the menu system
                MainMenu();


                if (Selection == 1)
                {
                    // NOT WORKING SELECTION = 1, LOOPS THEN DOES THE ELSE

                    for (int i = 0; i < book.Length / 2; i++)
                    {
                        //while (true)
                        if (book[i, 0] == empty)
                        {
                            Console.WriteLine("Please enter the Name in the format: Lastname, ForeName");
                            book[i, 0] = Convert.ToString(Console.ReadLine());
                            Console.WriteLine("");
                            Console.WriteLine("Please Enter the Address in the format: Number, Road Name, Town Name");
                            book[i, 1] = Convert.ToString(Console.ReadLine());
                            Console.WriteLine("");
                            Console.WriteLine("The name is: " + book[i, 0]);
                            Console.WriteLine("The Address is: " + book[i, 1]);
                            Console.WriteLine("Thank You for inputting the data Press Return to go to the Main Menu");
                            Console.ReadLine();
                            booksfull = false;
                            i = book.Length / 2;
                        }
                        else
                        {
                            booksfull = true;
                        }

                    }

                    if (booksfull == true)
                    {
                        Console.WriteLine("Sorry there is no space");
                        Console.WriteLine("Press Return to go to the Main Menu");
                        Console.ReadLine();
                    }
                    //break;
                    Console.WriteLine("Choice 1 here");
                    //Fill in

                }

                else if (Selection == 2)
                {
                    menuOption2();
                }


                //Display the book
                else if (Selection == 3)
                {
                    menuOption3();
                }

                else
                {
                    Console.WriteLine("Program Ended, Press Return to Close");
                }

            } while (Selection != 6);
            Console.ReadLine();
        }

        private static void menuOption3()
        {

            for (int i = 0; i < book.Length / 2; i++)
            {
                Console.WriteLine("____________________________________________");
                Console.WriteLine((i + 1) + " | " + book[i, 0] + " | " + book[i, 1]);

            }
            Console.WriteLine("Press Return to go to the Main Menu");
            Console.ReadLine();
        }

        private static void menuOption2()
        {
            // Ask for the Address Index
            Console.WriteLine("Please Enter The Address Index");
            index = Convert.ToInt32(Console.ReadLine());

            // Index Starts at 1, but array at 0 so taking the difference 
            index = (index - 1);

            // Write to Address Book.
            book[index, 0] = empty;
            book[index, 1] = empty;

            Console.WriteLine("Choice 2 here");
        }

        private static void defaultFill()
        {
            //Fill the Address book with 'XXXXXX' for blank entrys

            for (int i = 0; i < book.Length / 2; i++)
            {
                book[i, 0] = empty;
                book[i, 1] = empty;
            }
        }

        public static void MainMenu()
        {

            //Clear Everything above
            Console.Clear();
            Console.WriteLine("Please Select One of the following options:");
            Console.WriteLine("_________________________________");
            Console.WriteLine("| 1. | Add an Entry             |");
            Console.WriteLine("| 2. | Delete an Entry          |");
            Console.WriteLine("| 3. | Print Book to Screen     |");
            Console.WriteLine("| 6. | Exit The Address Book    |");
            Console.WriteLine("|_______________________________|");
            //Store the selection
            Selection = Convert.ToInt32(Console.ReadLine());
            //Clear the menu
            Console.Clear();

        }
    }
}

If it adds a book the boolean would go false.. and then jump out without leaving a message..

but if it dosen't add any books the boolean would become true and then write a message..

 

+ rep for helping dude, been working solid for my new job sorry i didnt reply before.

 

that's ok! had fun doing it.. i should begin to program a little bit again.. just dunno what