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Microsoft
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????? ????????? ?????????? ????? . ????? ??????? ?? ?????????? ?????????? ?????????????????? ??????? ??????? ??? ????? X1 ???? X1=2000 2000 ????? ????????? ??????? ?? ????? ?? ??????? ?????? ???????????. ??? ??????????? ?????– ? ????? ??????????????? ????????? ??????????
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? ??????? ?????? ???????????:
Dim ?????????? ????? as ????
Module Module1 Sub Main() Dim x As Byte Dim y1 As Short Dim y2 As Integer Dim y3 As Long Dim a1 As Single Dim a2 As Double Dim a3 As Decimal Dim s As String Dim z As Boolean Dim t1, t2 As Date 'Dim v As Object x = 128
y1 = 32700 y2 = 200000000 y3 = 667899 a1 = 3.40569
a2 = 1.0234567890123456 a3 = 10.234567********* s = "asirsoft" z = True t1 = #1/1/2010# t2 = #12/31/2010# Console.WriteLine(x) Console.WriteLine(y1) Console.WriteLine(y2) Console.WriteLine(y3) Console.WriteLine(a1) Console.WriteLine(a2) Console.WriteLine(a3) Console.WriteLine(s) Console.WriteLine(z) Console.WriteLine(t1) Console.WriteLine(t2) Console.ReadLine() End Sub End Module
14 – ?????
?? ????????? ?????????? ??????? ???? ?????? ???????? ?????????? ???? ???? . ??????:
Dim x As Byte = 128 Dim y1 As Short = 32700
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Module Module1
Sub Main()
Dim a As String
Dim c As String
a = "A"
c = Asc(a)
Console.WriteLine(c)
Console.ReadLine()
End Sub
End Module
14
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Dim v2 As Double = 5
v2 = v2 / v1 ???????????
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Console.WriteLine("v2=" & v2)
Dim x As Double = 3.5
Dim y As Double = 2.8
Dim z As Integer
z = CInt(x) + CInt(y)?? ?????? ???????
?????????
Console.WriteLine("z=" & z)
Dim c1 As Char = "A"
Dim c2 As Integer
c2 = Asc(c1)
Console.WriteLine("c2=" & c2)
Dim n1 As Integer = 10
Dim n2 As Double
??????n1????? ???????
n2 = CDbl(n1) / 3???????? ?? ?????????? ????? ????? ????????? ???
Console.WriteLine("n2=" & n2)
Console.ReadLine()
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16
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???? ??? Module Module1
Module Module1
Private x As Integer = 100 Sub Main()
Console.WriteLine("module1的变量X 是") Console.WriteLine(x) Module2.abc() Console.ReadLine() End Sub End Module
???? ??? Module Module2
Module Module2
Private x As String = "asirsoft" Sub abc()
Console.WriteLine("module2的变量X 是") Console.WriteLine(x) End Sub End Module
17- ?????
????? ???? ????? ?????? ?????????? ??? ????? ?????????????? ???????? ?????? ??? ?????????? x ?????? ?????? ?????????? ???????? ??????????
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? ????????????? ????? ?? .??? ????? ????????? ????? ?????? ?????????? ?????? ??????? ?????????? ????????? ????????? ???????????.
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Public ????? ?????? as ???? ??????? ?????? = ??????? ???????? ???????
????? ??? ?????? ???????? ?????????? ???????? ???????? .
18- ?????
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????16 – ????????????. ??????: ???? ??? Module Module1
Module Module1
Public x As Integer = 100 Sub Main()
Console.Write("module1的变量X 是") Console.WriteLine(x) Module2.abc() Console.ReadLine() End Sub End Module
???? ??? Module Module2
Module Module2 Sub abc()
Dim x As Integer = 200
Console.Write("引用module1的变量X 是") Console.WriteLine(Module1.x) End Sub End Modul
19- ?????
?? ????????? Console.WriteLine(Module1.x) ????5-??????? Module2 ?????????? ????? ???? ???????? ??????? ???
??? ???????? ???? ????? ???. x ???? ?????? ?????????? Module2 ????? ????? ?????? ????? Console.WriteLine(x)
20- ?????
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?????? ?????????? ????? ????? ?????? . ???????????? ?????? ???????? :?
static ????? ?????? as ???? ??????? ?????? = ?????? ???????? ????????
??????? ????? ????? ?????? ??? ??????? ??? :
???:
Module Module1 Sub Main() asirsoft() asirsoft() asirsoft()
Console.ReadLine() End Sub Sub asirsoft()
Static x As Integer x = x + 5
Console.WriteLine(x) End Sub End Module
?????? ???????? ???????????? ????? ??????? ??? .
?????? ????? ??? ???????????? Main ???????? ??????.???????? x + 5 ??????????x ?????? ???????? ???? ???????????? ??????asirsoft ??????? ??? ???????? ????????? ?????? ????? .?????????? ???????? ???????? ?????5??? x ?????????? ?????????? ??????. ??????????asirsoft()
????? ?????????? ??? ???????????????? ???????? ? ????? ?????? .??????? ???????? asirsoft()?????? ??????? .????????? ??????? ???? ????????????
???? ?????? ????? ????? ?????????. x + 5 ???.
21- ?????
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?????? ??????? ?????????? .?????????? ??? ?? ????? ?????? ???? ???????.
(lifetime) ????????? ???????? ????????? ??????????
?????????? ?????? ??? ????? ????????? ???????? ????????? ?????????? ??????? ??? ????? ???????? ?????????????. ?????????? ?????????? ???? ?????? ?????????? ?????????? ????? ???????? ?????? ??????????? ???????? ?????. ??????? ??????????? ????????? ???????? ?????? ????? ??? ?? ????? ??????? ???????? ?????? ????? ???????? ?????????. ?????????? ????? ?????? ?? ???????? ???????? ?????????? ??????? ?????? dim ?????? .??? ?????????? ???????????? ???????? static ???????? ???????? ?????? ?? ??????? ????????? ?? ?????? ?????????? ?????? ?????????? ?????????? .????? ????
?????? ???????? ??????? ????????? ????????? ????????.???????? ???????? ???????? ???????? ????? ?????? ???? ????????????? ?????? ????? ??? ?? ???????? ??????? ?????? ?????? ?????????? ???????? ??????? private ,public ?? ????? ????????????? ?????? ????? ?????????. ???? ????????
?????????? ??????? ???????? ?????? ?????????? ???????? ??? .
?????? ?????? ????? ????? ??????????? ???????? ??????????? ?????????? ?????????? ????????.??? ?????dim, public, private, static ??????? ???
?????????? ??? ???????.