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  1. using System;
  2.  
  3. public class Nibble
  4. {
  5.     const int bits = 4;
  6.  
  7.     private bool[] _bools = new bool[bits];
  8.  
  9.     public void Reset()
  10.     {
  11.         for ( int i = 0; i < _bools.Length; i++ )
  12.             _bools[i] = false;
  13.     }
  14.  
  15.     public void Increment()
  16.     {
  17.         bool[] result = new bool[bits];
  18.         bool[] carries = new bool[bits + 1];
  19.  
  20.         carries[0] = true;
  21.  
  22.         for ( int i = 0; i < bits; i++ )
  23.         {
  24.             result[i] = _bools[i] ^ carries[i];
  25.             carries[i + 1] = _bools[i] && carries[i];
  26.         }
  27.  
  28.         if ( carries[bits] )
  29.             Console.WriteLine("Overflow!");
  30.  
  31.         _bools = result;
  32.     }
  33.  
  34.     public byte Value
  35.     {
  36.         get
  37.         {
  38.             byte result = 0;
  39.             for ( int i = 0; i < bits; i++ )
  40.             {
  41.                 if ( _bools[i] )
  42.                     result += (byte)(1 << i);
  43.             }
  44.             return result;
  45.         }
  46.     }
  47. }
  48.  
  49. static class Program
  50. {
  51.     static void Main()
  52.     {
  53.         var nibble = new Nibble();
  54.         for ( int i = 0; i < 17; i++ )
  55.         {
  56.             Console.WriteLine(nibble.Value);
  57.             nibble.Increment();
  58.         }
  59.     }
  60. }
Success #stdin #stdout 0.03s 24120KB
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Overflow!
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https://ideone.com/X0QIhy
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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