Question Displacement of numbers

[shahryars]

hi
i want to make an app, that Displacement numbers and add them in listbox
for example: when i give it 713, it should add 713,731,317,371,173,137 to listbox
but i don't know how to do it, please help me!

 

[jmcilhinney]

You're basically talking about creating all combinations or permutations (I can never remember which is which) of a series of digits so that's what you should research. I'd be shocked if there weren't a number of examples available.

 

[MakeC_SharpAgain]

Maybe somehting like this. You can use a bootstrap algorithm to shift the numbers randomly. As long as the string is small.

     public class Test    {
        public List<String> ShiftedNumbers = new List<string>();
        public static Random Random = new Random();


        public String TakeOne(int lower, int upper, String Content)
        {
            return Content.Substring((int)Random.Next(lower, upper),1);
        }


        public List<String> Start(String NumbersToShift)
        {
            bool found = false;
            StringBuilder SB = new StringBuilder();
            String Current = "";


            int Faculty = GetFactorial(NumbersToShift.Length);


            do
            {
                SB.Clear();
                for (int i = 0; i <= NumbersToShift.Length - 1; i++)
                {
                    Current = TakeOne(0, NumbersToShift.Length, NumbersToShift);


                    if (SB.ToString().IndexOf(Current) <= -1)
                    {
                        SB.Append(Current);
                    }
                    else if (SB.ToString().Length >= NumbersToShift.Length)
                    {
                        break;
                    }
                    else if (SB.ToString().IndexOf(Current) >= 0)
                    {
                        i = i - 1;
                    }


                }


                found = false;
                for (int i = 0; i <= ShiftedNumbers.Count() - 1; i++)
                {
                    if (ShiftedNumbers[i] == SB.ToString())
                    {
                        found = true;
                        break;
                    }
                }


                if (found == false)
                {
                    ShiftedNumbers.Add(SB.ToString());
                }




            } while (ShiftedNumbers.Count() < Faculty);


            return ShiftedNumbers;


        }


        public int GetFactorial(int Length)
        {
            int R = 1;


            for (int i = 1; i<= Length; i++)
            {
                R = R * i;
            }


            return R;


        }


    }

There are C# operators like << and >> . I have not tried them so far but they should have something to do with shifting chars or numbers.