Question

How to random (shuffle) array of integers in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static Random _random = new Random();

        // Fisher-Yates shuffle
        static void Shuffle<T>(T[] array)
        {
            int n = array.Length;
            for (int i = 0; i < n; i++)
            {
                int rand = i + _random.Next(n - i);
                T temp = array[rand];
                array[rand] = array[i];
                array[i] = temp;
            }
        }
        static void Main()
        {
            int[] array = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

            Shuffle(array);

            foreach (int n in array) {
                Console.Write("{0} ", n);
            }
            Console.WriteLine();
        }
    }
}


/*
run:
   
4 9 1 8 2 5 6 7 3
 
*/

 

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