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  1. using System;
  2. using System.IO;
  3. using System.Text.RegularExpressions;
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		String Expression = "2 * 3";
  9.         Regex regEx = new Regex(@"([+-]?\d+\.*\d*[eE][+-]?\d+|[-+]?\d+\.*\d*)\s*([/*+-])\s*(-?\d+\.*\d*[eE][+-]?\d+|-?\d+\.*\d*)");
  10.  
  11.         Expression = regEx.Replace(Expression,Repl);
  12.         Console.WriteLine(Expression);
  13. 	}
  14.  
  15. 	public static string Repl(Match m)
  16. 	{
  17. 		double result = Convert.ToDouble(m.Groups[3].Value);
  18. 		result = Convert.ToDouble(m.Groups[3].Value) / 100 * 2;
  19.         if (result < 0 || m.Index == 0)
  20.            return m.Value.Replace(m.Groups[3].Value, result.ToString());
  21.         else 
  22.            return m.Value.Replace(m.Groups[3].Value, "+" + result.ToString());
  23. 	}
  24. }
  25.  
  26.  
Success #stdin #stdout 0.13s 24336KB
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Standard input is empty
stdout
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2 * 0.06
https://ideone.com/TyCPvu
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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