reversing an array..

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I am new to .NET. I want to reverse an array i have done sample program but i am getting error.

C#

class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[6] { 1, 2, 3, 4, 5, 6, };
            //int[] b = new int[6];
            //int[] c = new int[6];
            Console.WriteLine("Elements in Array are:-");
            for (int i = a.Length; i >= 0; i--)
            {
                Console.WriteLine(a[i] + "");
            }
            Console.ReadLine();
        }


    }
}

i am getting error like this.
Index was outside the bounds of the array

thank you.

Posted 4-Mar-12 4:11am

gopisagar

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2 solutions

Solution 2

You're doing it the hard way.

You only need a single line of code:

class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[6] { 1, 2, 3, 4, 5, 6, };

            Array.Reverse(a);

            Console.WriteLine("Elements in Array are:");
            for (int i = 0; i < a.Length; i++)
            {
                Console.WriteLine(a[i] + "");
            }
            Console.ReadLine();
        }
    }
}

Keep in mind, the Length of any array will tell you how many elements there are in it. For for an array of Length 10, the elements will be indexed 0 through 9. That's why your code was throwing an "Index out of bounds" error.

Posted 4-Mar-12 7:55am

Dave Kreskowiak

Comments

Shahin Khorshidnia 4-Mar-12 15:05pm

+4 (not 5) because you retouched the array. You could make an alternative array for reversing it.

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Shahin Khorshidnia · Accepted Answer · 2012-03-04T04:15:00

Hello

C#

static void Main(string[] args)
     {
         int[] a = new int[6] { 1, 2, 3, 4, 5, 6, };

         Console.WriteLine("Elements in Array are:-");
         for (int i = a.Length; i > 0; i--)
         {
             Console.WriteLine(a[i - 1] + " ");
         }
         Console.ReadLine();
     }

Or

C#

static void Main(string[] args)
{
    int[] a = new int[6] { 1, 2, 3, 4, 5, 6, };

    Console.WriteLine("Elements in Array are:-");
    for (int i = a.Length - 1; i >= 0; i--)
    {
        Console.WriteLine(a[i] + "");
    }
    Console.ReadLine();
}

Or

C#

int[] a = new int[6] { 1, 2, 3, 4, 5, 6, };

int[] revers = a.Reverse().ToArray();

Console.WriteLine("Elements in Array are:-");
foreach (int i in revers)
{
    Console.WriteLine(i + "");
}

reversing an array..

2 solutions

Solution 2

Solution 1

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reversing an array..

2 solutions

Solution 2

Solution 1

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