public class Test
public Shared Sub Main
Dim X, Y As Complex
X = New Complex(1, 4)
Y = New Complex(2, 3)
Console.WriteLine((X + Y).ToString)
Console.WriteLine((X - Y).ToString)
Console.WriteLine((X * Y).ToString)
Console.WriteLine((X = Y).ToString)
Console.WriteLine((X <> Y).ToString)
Console.WriteLine((-X).ToString)
Dim abs_x As Double = CDbl(X)
Console.WriteLine(abs_x.ToString)
End Sub
End class
Public Class Complex
Public Re As Double
Public Im As Double
Public Sub New()
End Sub
Public Sub New(ByVal real_part As Double, ByVal imaginary_part As Double)
Re = real_part
Im = imaginary_part
End Sub
Public Overrides Function ToString() As String
Return Re.ToString & " + " & Im.ToString & "i"
End Function
Public Shared Operator *(ByVal c1 As Complex, ByVal c2 As Complex) As Complex
Return New Complex( _
c1.Re * c2.Re - c1.Im * c2.Im, _
c1.Re * c2.Im + c1.Im * c2.Re)
End Operator
Public Shared Operator +(ByVal c1 As Complex, ByVal c2 As Complex) As Complex
Return New Complex( c1.Re + c2.Re,c1.Im + c2.Im)
End Operator
Public Shared Operator -(ByVal c1 As Complex, ByVal c2 As Complex) As Complex
Return New Complex(c1.Re - c2.Re, c1.Im - c2.Im)
End Operator
Public Shared Operator =(ByVal c1 As Complex, ByVal c2 As Complex) As Boolean
Return (c1.Re = c2.Re) AndAlso (c1.Im = c2.Im)
End Operator
Public Shared Operator <>(ByVal c1 As Complex, ByVal c2 As Complex) As Boolean
Return (c1.Re <> c2.Re) OrElse (c1.Im <> c2.Im)
End Operator
Public Shared Operator -(ByVal c1 As Complex) As Complex
Return New Complex(c1.Im, c1.Re)
End Operator
Public Shared Narrowing Operator CType(ByVal c1 As Complex) As Double
Return System.Math.Sqrt(c1.Re * c1.Re + c1.Im * c1.Im)
End Operator
End Class
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