Initial data commit

Task/Arithmetic-geometric-mean/Visual-Basic-.NET/arithmetic-geometric-mean-1.vb

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+Imports System.Math
+Imports System.Console
+
+Module Module1
+
+    Function CalcAGM(ByVal a As Double, ByVal b As Double) As Double
+        Dim c As Double, d As Double = 0, ld As Double = 1
+        While ld <> d : c = a : a = (a + b) / 2 : b = Sqrt(c * b)
+            ld = d : d = a - b : End While : Return b
+    End Function
+
+    Function DecSqRoot(ByVal v As Decimal) As Decimal
+        Dim r As Decimal = CDec(Sqrt(CDbl(v))), t As Decimal = 0, d As Decimal = 0, ld As Decimal = 1
+        While ld <> d : t = v / r : r = (r + t) / 2
+            ld = d : d = t - r : End While : Return t
+    End Function
+
+    Function CalcAGM(ByVal a As Decimal, ByVal b As Decimal) As Decimal
+        Dim c As Decimal, d As Decimal = 0, ld As Decimal = 1
+        While ld <> d : c = a : a = (a + b) / 2 : b = DecSqRoot(c * b)
+            ld = d : d = a - b : End While : Return b
+    End Function
+
+    Sub Main(ByVal args As String())
+        WriteLine("Double  result: {0}", CalcAGM(1.0, DecSqRoot(0.5)))
+        WriteLine("Decimal result: {0}", CalcAGM(1D, DecSqRoot(0.5D)))
+        If System.Diagnostics.Debugger.IsAttached Then ReadKey()
+    End Sub
+
+End Module