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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. public class Test
  5. {
  6. 	public static void Main()
  7. 	{
  8. 		string[] strings = {"-3x^2 + 4.8x + 4.0 = 0", "5x + 4 = 0", "test 5 + 4 = 0"};	
  9.         String pattern = @"(?:[+-]?\d+(?:\.\d+)?[a-z]\^2 [+-] )?\d+(?:\.\d+)?[a-z] [+-] \d+(?:\.\d+)? = 0";
  10.         foreach (string s in strings)
  11.         {
  12.             if (Regex.IsMatch(s, pattern)) {
  13.                 Console.WriteLine("Match {0} ", s);
  14.             } else {
  15.                 Console.WriteLine("No match: {0}", s);
  16.             }
  17.         }
  18. 	}
  19. }
Success #stdin #stdout 0.03s 134592KB
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stdin
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Standard input is empty
stdout
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Match -3x^2 + 4.8x + 4.0 = 0 
Match 5x + 4 = 0 
No match: test 5 + 4 = 0
https://ideone.com/yFdVan
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
public

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