3X+1 in C#

For my day job, I do embedded C programming for PIC24 compilers and some Windows C programming in something called LabWindows. Lately, I’ve been touching some C# stuff, so I decided to revisit last night’s 3X+1 program by converting it to C#.

You can compile and run it online here: https://www.onlinegdb.com/online_csharp_compiler

// 3X+1

using System;
					
public class Program
{
	public static void Main()
	{
		while (true)
		{
			Int32 x = 0;

			Console.WriteLine();
			Console.Write("STARTING NUMBER? ");
			x = Int32.Parse(Console.ReadLine());
			
			while (true)
			{
				Console.Write(x);
				Console.Write(" ");
				
				if (x == 1) break;
				
				if ((x & 1) == 1) // Odd
				{
					x = x * 3 + 1;
				}
				else // Even
				{
					x = x / 2;
				}
			}
		}
	}
}

2 thoughts on “3X+1 in C#

    1. Allen Huffman Post author

      I am not sure. There are “isnum()” for strings. I think a macro:

      #define isOdd(n) (x & 1)

      unsigned int x;

      X = 42;

      If isOdd(x)
      {
      /* odd /
      }
      else
      {
      /
      even */
      }

      Reply

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