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  1. using System;
  2.  
  3. public class Test
  4. {
  5. 	public static void Main()
  6. 	{
  7. 		string stringNumber = "42";
  8. 		int number = StringToInteger(stringNumber);
  9.  
  10. 		System.Console.WriteLine(number);
  11. 	}
  12.  
  13. 	public static int StringToInteger(string value)
  14.     {
  15.         int number = 0;
  16.         foreach (var character in value)
  17.             number = (number << 1) + (number << 3) + (character - '0');
  18.  
  19.         return number;
  20.     }
  21. }
Success #stdin #stdout 0.02s 15988KB
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stdin
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Standard input is empty
stdout
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42
https://ideone.com/0UnR06
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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