jloga4
6/26/2017 - 10:39 PM

Example of using iteration to execute nested loops. From Fundamentals of Computer Programming with C# http://www.introprogramming.info/wp-co

Example of using iteration to execute nested loops. From Fundamentals of Computer Programming with C# http://www.introprogramming.info/wp-content/uploads/2013/07/Books/CSharpEn/Fundamentals-of-Computer-Programming-with-CSharp-Nakov-eBook-v2013.pdf

IterativeNestedLoops.cs
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static int numberOfLoops;
static int numberOfIterations;
static int[] loops;

static void Main()
{
  Console.Write("N = ");
  numberOfLoops = int.Parse(Console.ReadLine());
  Console.Write("K = ");
  numberOfIterations = int.Parse(Console.ReadLine());
  loops = new int[numberOfLoops];
  NestedLoops();
}

static void NestedLoops()
{
  InitLoops();
  int currentPosition;

  while (true)
  {
    PrintLoops();
    currentPosition = numberOfLoops - 1;
    loops[currentPosition] = loops[currentPosition] + 1;
    while (loops[currentPosition] > numberOfIterations)
    {
      loops[currentPosition] = 1;
      currentPosition--;
      if (currentPosition < 0)
      {
        return;
      }
      loops[currentPosition] = loops[currentPosition] + 1;
    }
  }
}

static void InitLoops()
{
  for (int i = 0; i < numberOfLoops; i++)
  {
    loops[i] = 1;
  }
}

static void PrintLoops()
{
  for (int i = 0; i < numberOfLoops; i++)
  {
    Console.Write("{0} ", loops[i]);
  }
  Console.WriteLine();
}

//  N = 2
//  K = 3
//  1 1
//  1 2
//  1 3
//  2 1
//  2 2
//  2 3
//  3 1
//  3 2
//  3 3