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  1. using System;
  2.  
  3. public class Test
  4. {
  5. 	public static void Main()
  6. 	{
  7. 		for (decimal x = 1 ; x != 2 ; x+=0.01M) {
  8. 			decimal y = CustomRound(x);
  9. 			Console.WriteLine("{0:0.00} {1:0.00}", x, y);
  10. 		}
  11. 	}
  12.  
  13. 	private static decimal CustomRound(decimal x)
  14.     {
  15.       var rX = Math.Truncate(x * 100) / 100;
  16.       var t = rX * 100 % 5;
  17.       if (t == 0) return rX;
  18.       if (t < 3)
  19.         rX = rX - ((decimal)t / 100);
  20.       else if (t < 8)
  21.         rX = rX + (((decimal)t / 100) - 0.05m);
  22.       else
  23.         rX = rX + ((decimal)t / 100);
  24.       return rX;
  25.     }
  26. }
Success #stdin #stdout 0.05s 26948KB
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stdin
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Standard input is empty
stdout
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1.00 1.00
1.01 1.00
1.02 1.00
1.03 1.01
1.04 1.03
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1.06 1.05
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1.48 1.46
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1.55 1.55
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1.64 1.63
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1.69 1.68
1.70 1.70
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1.84 1.83
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1.97 1.95
1.98 1.96
1.99 1.98
https://ideone.com/owxFPL
language:
C# (gmcs 5.20.1)
created:
19 days ago
visibility:
public

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