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  1.     using System;
  2.     using System.Text.RegularExpressions;
  3.     public class Test
  4.     {
  5.         public static void Main()
  6.         {
  7.   string pattern = @"\d+_(\d+)(?:-0{0,}(\d+))?_.*";
  8.         string input = @"617809_53070664_EB867_20170710
  9. 617809_53069537_308CB588_20170710
  10. 617809_53069392_307RS0635_20170710
  11. 617809_53060543-001_307RS0630_20170710
  12. ";
  13.  
  14.             foreach (Match m in Regex.Matches(input, pattern))
  15.             {
  16.                 if(m.Groups[2].Value!="")
  17.                  Console.WriteLine(m.Groups[1]+"/"+m.Groups[2]);
  18.                 else
  19.                  Console.WriteLine(m.Groups[1]);
  20.             }
  21.         }
  22.     }
Success #stdin #stdout 0.04s 133824KB
comments ()
stdin
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Standard input is empty
stdout
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53070664
53069537
53069392
53060543/1
https://ideone.com/royyiK
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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