Data commit

Task/Test-integerness/C-sharp/test-integerness.cs

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+namespace Test_integerness
+{
+	class Program
+	{
+		public static void Main(string[] args)
+		{
+			Console.Clear();
+			Console.WriteLine();
+			Console.WriteLine(" ***************************************************");
+			Console.WriteLine(" *                                                 *");
+			Console.WriteLine(" *              Integerness test                   *");
+			Console.WriteLine(" *                                                 *");
+			Console.WriteLine(" ***************************************************");
+			Console.WriteLine();
+			
+			ConsoleKeyInfo key = new ConsoleKeyInfo('Y',ConsoleKey.Y,true,true,true);
+			
+			while(key.Key == ConsoleKey.Y)
+			{
+				// Get number value from keyboard
+				Console.Write(" Enter number value : ");
+				
+				string LINE = Console.ReadLine();
+				
+				// Get tolerance value from keyboard
+				Console.Write(" Enter tolerance value : ");
+				
+				double TOLERANCE = double.Parse(Console.ReadLine());
+				
+				
+				// Resolve entered number format and set NUMBER value
+				double NUMBER = 0;
+				
+				string [] N;
+				
+				// Real number value
+				if(!double.TryParse(LINE, out NUMBER))
+				{
+					// Rational number value
+					if(LINE.Contains("/"))
+					{
+						N = LINE.Split('/');
+						
+						NUMBER = double.Parse(N[0]) / double.Parse(N[1]);
+					}
+					// Inf value
+					else if(LINE.ToUpper().Contains("INF"))
+					{
+						NUMBER = double.PositiveInfinity;
+					}
+					// Complex value
+					else if(LINE.ToUpper().Contains("I"))
+					{
+						// Delete letter i
+						LINE = LINE.ToUpper().Replace("I","");
+						
+						string r = string.Empty; // real part
+						string i = string.Empty; // imaginary part
+						
+						int s = 1; // sign offset
+						
+						// Get sign
+						if(LINE[0]=='+' || LINE[0]=='-')
+						{
+							r+=LINE[0].ToString();
+							LINE = LINE.Remove(0,1);
+							s--;
+						}
+						// Get real part
+						foreach (char element in LINE)
+						{
+							if(element!='+' && element!='-')
+								r+=element.ToString();
+							else
+								break;
+						}
+						// get imaginary part
+						i = LINE.Substring(LINE.Length-(r.Length+s));
+						
+						NUMBER = double.Parse(i);
+						if(NUMBER==0)
+							NUMBER = double.Parse(r);
+						else
+							NUMBER = double.NaN;
+						
+					}
+					// NaN value
+					else
+						NUMBER = double.NaN;
+				}
+				
+				
+				// Test
+				bool IS_INTEGER = false;
+				bool IS_INTEGER_T = false;
+				
+				if(double.IsNaN(NUMBER))
+					IS_INTEGER=false;
+				
+				else if(Math.Round(NUMBER,0).ToString() == NUMBER.ToString())
+					IS_INTEGER = true;
+				
+				else if((decimal)TOLERANCE >= (decimal)Math.Abs( (decimal)Math.Round(NUMBER,0) - (decimal)NUMBER ))
+					IS_INTEGER_T = true;
+
+				
+				
+				if(IS_INTEGER)
+					Console.WriteLine(" Is exact integer " + IS_INTEGER);
+				
+				else
+				{
+					Console.WriteLine( " Is exact integer " + IS_INTEGER );
+					Console.WriteLine( " Is integer with tolerance " + IS_INTEGER_T );
+				}
+				
+				
+				Console.WriteLine();
+				Console.Write(" Another test < Y /N > . . . ");
+				key  = Console.ReadKey(true);
+				Console.WriteLine();
+				Console.WriteLine();
+			}
+			
+		}
+		
+	}
+}