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POMaking an address book in C# using Arrays
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  1. POMaking an address book in C# using Arrays
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    copied!<p>I'm new here but basically I need some help. I've got a university assignment and I'm having some trouble with it.</p> <p>I'm trying to make an address book in C# as a console application and I've built my array and my case statement etc but I've got to a point where I don't know how to edit/add data to it.</p> <p>The array is populated with "XXXXX" and I'm supposed to be able to change those to add first name, surname, house number&amp;road name, state and zip code with row 1 being first name, row 2 being surname etc. Will the code I have written in case 1 do this or have I done that wrong?</p> <p>Also, case 3 is supposed to print the book to the screen but it is coming up with an error message saying it does not recognize s1, s2, s3, s4, s5 when I have declared them in the array. Is this because the array is separate to the rest of the program?</p> <p>here is what I have got so far, it may very well be completely wrong but any help at all will be greatly appreciated.</p> <p>Thanks alot.</p> <pre><code>using System; public static void Main() { string s1, s2, s3, s4, s5; string select; string input; char charselect; char answer; string[,] a = new string[10, 5] { {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"}, {"XXXXX", "XXXXX", "XXXXX", "XXXXX", "XXXXX"} }; for (int i = 0; i &lt; a.Length / 5; i++) { s1 = a[i, 0]; s2 = a[i, 1]; s3 = a[i, 2]; s4 = a[i, 3]; s5 = a[i, 4]; } Console.WriteLine("Do You Want to Open The Address Book?"); Console.WriteLine("Type Y or N"); input = Console.ReadLine(); answer = Convert.ToChar(input); while (answer == 'Y') { Console.WriteLine("1. Add Entry"); Console.WriteLine("2. Delete Entry"); Console.WriteLine("3. Print Book to Screen"); select = Console.ReadLine(); { charselect = Convert.ToChar(select); char selection = (charselect); switch (selection) { case '1': string firstname; { Console.WriteLine("Please enter the first name of your entry"); firstname = Console.ReadLine(); for (int i = 0; i &lt; a.Length / 10; i++) { if (a[i, 0] == "XXXXX") { a[i, 0] = "firstname"; } } Console.ReadLine(); break; } case '2': { Console.WriteLine(""); Console.ReadLine(); break; } case '3': { Console.WriteLine("{0}, {1}, {2}, {3}, {4}", s1, s2, s3, s4, s5); Console.ReadLine(); break; } default: { Console.WriteLine("Incorrect selection, please try again"); Console.ReadLine(); break; } } } } } </code></pre>
 

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