1 // Student: Pat Moss www.patmoss.com/cis162ad/
  2 // Instructor: Dave Hammer http://members.cox.net/dwhammer/
  3 
  4 // CIS162AD -- C Sharp (C#) -- Section 5832
  5 // Professor: Dave Hammer  dwhammer@cox.net
  6 // http://members.cox.net/dwhammer/
  7 // Student:   Pat Moss patmoss@patmoss.com
  8 // http://www.patmoss.com/cis162ad/
  9 
 10 // Midterm
 11 // III. Programming Exercise
 12 // Write a program for a package delivery service. The program
 13 // contains an array that holds the 10 ZIP codes to which the
 14 // company delivers packages. Prompt a user to enter a ZIP code
 15 // and display a message indicating whether the ZIP code is one
 16 // to which the company delivers. Turn in your source code for
 17 // this program.
 18 
 19 // Program Name: Zipcodes.cs  Rev. 01  02-28-2006  by pat moss
 20 // Textbook: Visual C# .NET Programming, Barbara Doyle, 0619159979
 21 
 22 using System;
 23 namespace zipcodes
 24 {
 25   public class zipcodes
 26   {
 27     public static void Main()
 28     {
 29       bool moreToDo = true;
 30       int inpZipcode = 0;
 31       bool zipcodeOK = false;
 32 
 33       DisplayInstructions();
 34 
 35       while (moreToDo == true)
 36       {
 37         Console.Write("\nEnter a ZIP code value (5 digits): ");
 38         inpZipcode = Convert.ToInt32(Console.ReadLine());
 39 
 40         if (inpZipcode > 0)
 41         {
 42           zipcodeOK = checkZipcode(inpZipcode);
 43 
 44           switch (zipcodeOK)
 45           {
 46             case true:
 47               Console.WriteLine("The ZIP code {0} is valid.", inpZipcode);
 48               break;
 49             case false:
 50               Console.WriteLine("The ZIP code {0} is not valid.", inpZipcode);
 51               break;
 52             default:
 53               break;
 54           }
 55         }
 56         else
 57         {
 58           Console.WriteLine("\nZipcode application -- All done...");
 59           moreToDo = false;
 60         }
 61       }
 62     }
 63 
 64     // display user instructions
 65     static void DisplayInstructions()
 66     {
 67       Console.WriteLine("Zipcode application by Student: Pat Moss  Instructor: Dave Hammer\n");
 68       Console.WriteLine("CIS162AD  C#  Midterm, III. Programming Exercise\n");
 69       Console.WriteLine("Zipcodes.cs  Rev. 01  Feb. 28, 2006\n");
 70       Console.WriteLine("User Instructions:");
 71       Console.WriteLine("Enter various 5-digit US ZIP codes, one at a time, and press Enter.");
 72       Console.WriteLine("Then the program will display whether the ZIP code is valid.");
 73       Console.WriteLine("Enter a zero or negative ZIP code value to quit.");
 74     }
 75 
 76     // check to determine if the input zip code is valid
 77     static bool checkZipcode(int inpZip)
 78     {
 79       int[] ziptbl = {85001, 85002, 85003, 85004, 85005,
 80                       85006, 85007, 85008, 85009, 85010};
 81       int i = 0;
 82       for (i=0; i<10; i++)
 83       {
 84         if(ziptbl[i] == inpZip)
 85           return true;
 86       }
 87       return false;
 88     }
 89   }
 90 }
 91