C# Program CheckZIPS

[fiatnm]

Program checkZIPS is working well with all the zip code except "BK 87946". When I entered BK 87946 the output was “Zip BK 87946 not found”. Please explain. I am attaching the program.

using System;
public class CheckZIPS
{
    public static void Main()
    {
        string[] zips = {"BF 45633", "GJ 76895", "BK 87946", "NM 38657"};
        int x;
        string enterzip;
 
        Console.Write("Enter Zip code: ");
 
        enterzip = Console.ReadLine();
 
        x = Array.BinarySearch(zips, enterzip);
 
        if(x < 0)
            Console.WriteLine("Zip {0} not found", enterzip);
        else
            Console.WriteLine("Zip {0} was found at position {1}",
                enterzip, x);
    }
}

[Jon Bordelon]

Your zips aren't arranged in ascending order, so it's not checking it correctly.