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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. public class HW
  5. {
  6.     public double? H { get; private set; }
  7.     public double? W { get; private set; }
  8.  
  9.     public static HW FromFormula(string formula)
  10.     {
  11.         var decimalPattern = @"\d*(\.\d*)?";
  12.         var operatorPattern = @"\s*[-+*/×÷]\s*";
  13.         var r = new Regex($@"(w(?<w>{decimalPattern})|WW){operatorPattern}(h(?<h>{decimalPattern})|HH)");
  14.         var m = r.Match(formula);
  15.         if (!m.Success) return null; //throw new FormatException();
  16.         var hw = new HW();
  17.         var h = m.Groups["h"];
  18.         if (h.Success) hw.H = hw.H = double.Parse(h.Value);
  19.         var w = m.Groups["w"];
  20.         if (w.Success) hw.W = double.Parse(w.Value);
  21.         return hw;
  22.     }
  23. }
  24.  
  25.  
  26. public class Test
  27. {
  28. 	public static void Main()
  29. 	{
  30. 		var fs = new[] 
  31.         {
  32.             "w900×HH",
  33.             "WW×h1000",
  34.             "WW×HH",
  35.             "w900/h100",
  36.         };
  37.  
  38.         foreach (var f in fs)
  39.         {
  40.             var hw = HW.FromFormula(f);
  41.             if (hw == null)
  42.                 Console.WriteLine($"Invalid Formula: {f}");
  43.             else
  44.                 Console.WriteLine($"Valid Formula: {f}, H = {hw.H}, W = {hw.W}");
  45.         }
  46. 	}
  47. }
Success #stdin #stdout 0.03s 134592KB
comments (?)
stdin 
Standard input is empty
stdout 
Valid Formula: w900×HH, H = , W = 900
Valid Formula: WW×h1000, H = 1000, W = 
Valid Formula: WW×HH, H = , W = 
Valid Formula: w900/h100, H = 100, W = 900
https://ideone.com/b9pjrG
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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