RosettaCodeData/Task/Pathological-floating-point.../Visual-Basic-.NET/pathological-floating-point...

55 lines
1.6 KiB
VB.net

Imports System.Globalization
Imports System.Numerics
Imports Numerics
#Const USE_BIGRATIONAL = True
#Const BANDED_ROWS = True
#Const INCREASED_LIMITS = True
#If Not USE_BIGRATIONAL Then
' Mock structure to make test code work.
Structure BigRational
Overrides Function ToString() As String
Return "NOT USING BIGRATIONAL"
End Function
Shared Narrowing Operator CType(value As BigRational) As Decimal
Return -1
End Operator
End Structure
#End If
Module Common
Public Const FMT_STR = "{0,4} {1,-15:G9} {2,-24:G17} {3,-32} {4,-32}"
Public ReadOnly Property Headings As String =
String.Format(CultureInfo.InvariantCulture,
FMT_STR,
{"N", "Single", "Double", "Decimal", "BigRational (rounded as decimal)"})
<Conditional("BANDED_ROWS")>
Sub SetConsoleFormat(n As Integer)
If n Mod 2 = 0 Then
Console.BackgroundColor = ConsoleColor.Black
Console.ForegroundColor = ConsoleColor.White
Else
Console.BackgroundColor = ConsoleColor.White
Console.ForegroundColor = ConsoleColor.Black
End If
End Sub
Function FormatOutput(n As Integer, x As (sn As Single, db As Double, dm As Decimal, br As BigRational)) As String
SetConsoleFormat(n)
Return String.Format(CultureInfo.CurrentCulture, FMT_STR, n, x.sn, x.db, x.dm, CDec(x.br))
End Function
Sub Main()
WrongConvergence()
Console.WriteLine()
ChaoticBankSociety()
Console.WriteLine()
SiegfriedRump()
SetConsoleFormat(0)
End Sub
End Module