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Console. Write("6+9="): Console. Write(6 + 9)

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Console. WriteLine("I love vb. net")

Console. WriteLine("I love vb. net")

Console. WriteLine("I love vb. net")

Console. WriteLine("I love vb. net")

Console. WriteLine("I love vb. net")

Console. ReadLine()

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Console. WriteLine(" * ") Console. WriteLine(" *** ") Console. WriteLine(" ***** ") Console. WriteLine(" *******") Console. ReadLine() End Sub End Module

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Dim a, b, c As Integer a = 7 b = 6 c = a + b

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Dim a, som As Integer

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Console.Write("请输自己喜欢的一个数字?")

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Console.ReadLine()

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?????? ??????:

?????? ??????? ???????? ????????? ??????? ?????? ????? ??????? ??? .???????? ?????? ??? ????? ??????? ???????. ?????? ???????? ?????? ??????? ????? ?????????? ???? ??? ????? https://www.doczj.com/doc/f914817142.html, ???????? 1/4,10*3,12,34,67 ?????? ??????????? ???????? ??? ????????????? ??????? ?????: ????????? ?????? ????? ?????. ????? ?????? ?????? ????? ??????? ??? ????? ?????? ??? ????? ?????????? ????? ?????? ??? ????? ????? ????????????

??????? ??? ? ????? ?????? .?????? ?? ???? ??? ???????? ?????? ??????????? ??????????? ??????????? . ??????:

???? ??????? ??????

????? ????? Integer % 32% Long & 125& Single ! 256! Double # 36.5#

Decimal @ 9223372036854775808

?? ????? ????????? ?? ?????? ???? ??? ?????? ??????????? ???????? ????? ????????

???????? ??? &H &H2A ?????????

&O

&O37

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? ????? ?????? ???? ???? ????? ?????????? .(“ ”)

????? ???? ??????? ?????? ?????????? ???& ????? ????? ????? .?????? ????????? ?? ???????? ?????? abc”, “happy new year !”

??? ????? ??????? ????: (form feed) ?????? ?????????? ??? (tab ) ?????? ?????????????????(line feed)

Macromedia “ & chr(9) & “Microsoft” Macromedia Microsoft Macromedia “ & chr(10) & “Microsoft Macromedia

Microsoft

????? ????? ??? ????? ?????? chr(10) ? ????? ????? ????? ?????? ???? . ??? ??? ??????? ?????????chr(9) ????? ?????:?????????? ???????

?????? .? ?????? ??? ???? ????? ?????? ??????? ?.

?????? ?????

??????? 0 ????? ????? null 12 ??????????? ??? 13

???????? ?????? (enter)

????????:

???????????? ??????. ?????? (properties) ?????? ??????? ?????? ??? ??? ???? ????? ???? ??????? ?????? ?????? ???????? ????? ????????. ????? ?????? ??????????? ?????? ????? ??? ???? ????????? ?????????? ?????? ????????? ?????? ???????? ???????? ?????? ??????? ?????????? ???????????

?????? ?????????. ??????? ????? ??? ??? ??????:

a.MaxValue ??????? ??? ??? ???a a.MinValue ??????? ????? ??? ???a

?????? ?????????? :

???? ???????? ?????????????? ??? ????? ?????? ?????? ?????????? ?????????? ??????? .?????????? ???????? ?????? ???? ?????? ??????? ?????? ??? ?????

??????? ???????? ?????? ?????????? ???? ???????? ?? ?????? ???????. ??????????? ??????? ???????? ????????? ?????? ???????? ?????? ??? ????? ?? ?????? ?????????? ??? ??????????????? ?? ??? Variable ??????? ???????? ???????? ???????? ?????????? ???????? ?????? .???????? ????? ?????

????????? ??????? ???????????? ????? ????? ??????? .????? ????? ??????? ????????? ?????????? ??? ??? ??????? ???????????? ?????? ????????. ???????? ??? ??????? ????? ??????????? ????? ????? . ????????.?????????? ??? ???? ????? ??????? ??????????? ??? ??????????? ????? ?????? ?????? ???

?????? ?????? ?????? ?????? ????? ??????? ?????? ??????????? ?????? ??????? ???????????.

???? ??? ???????

??? ?????????? ?????? ????? ???? ????????????????? ???? .??????????? ??? ?????? ??????????? ??? ??? ????????? ??????? ??????? ??? ????? ????????????????? ???????? ???????? ??? ???? ??? ????? ??????? ????? ?????? ??????????? ??????????.

??????:

X1=2000

????? ????????? ?????????? ????? . ????? ??????? ?? ?????????? ?????????? ?????????????????? ??????? ??????? ??? ????? X1 ???? X1=2000 2000 ????? ????????? ??????? ?? ????? ?? ??????? ?????? ???????????. ??? ??????????? ?????– ? ????? ??????????????? ????????? ??????????

??? ??????? ?????? ??????? ?????? ? ??????? ??????? ?? ??? ??? ??????????? ?????? ?????????? ?????

????? ???????? ????? ?????? ??????? ?????? ?????????? ???????? ??????? ??? ????? ?????? ???????? ?????? ?????????? ???????? ?? Dim ????????

?????? ? ??????? ????? ?????? ?????????? . ??????:

? ??????? ?????? ???????????:

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

?????????? ?????? ?????? ?????? ???????? .

????? ?????? ???? ??????? ??????. ????? ?????? ???? ?????????? ???????????? ????? ???????? ????? ????? ????? ??????????? ??https://www.doczj.com/doc/f914817142.html, ??????

????????? ???????? ??????? ?????? ?????? ??????.???????? ??????? ???? ????? ?????? ?????????? ????? ???????? ??????????.

?????? ?????? ????? ????????. (,)??? ????????? ?????? ??????????? ?????????? ????????? ?????? ??? ?????? ???

??????????? ????????? ???? ??????? ??????

????? ???????? ????? ????????? ????? ?????????? ??? ????? ??????????? ????????? ??????? ????????????? ?????? ??? ????? ????? ????? ??????? ??????? ?????? ????? ????????? ????????????? ??????? ????????? ???? . ??? ??????????????? ??????????? ??????? ??????? ?????? ????????? ????? ??? ?????? ????????? ?????????????? ?????? ? ????? ???????????? ?????????? ?????? ?????

? ?????????? ??????? ??????????? ?????? ???? ?????????????? ??? ?????? ????? ??????? ??????? ??? ????? ???? ?????.

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Cbool ????????? ????? ??? ???????? ?????? ???????? ?????????CObj ??????? ????? ???????? ???????? ??????

???

Cbyte ?????????? ????? ????? ???????? ???????? ??????Cshort ???????? ????? ????? ????? ???????? ??????

?

Cchar ??? ??????? ?????? ???? ??????? ??????? ??????? ?????

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?????????? ????? ????????

Cdate ?????????? ????? ????? ????? ????? ?????Csrt ?????????? ???????

CDbl ????????? ??????? ???????????? ??? ???????? ??????

??????????

Ctype ?????????? ????????? ?????? ??????????

CDec ?????????? ??????????????? ?????? ???????? ??????Chr ?

????? ??????? ?????? ?????? ????

?????????CInt ?????????? ???????? ?????? ????? ???????? ??????Str ????????????????? ???????? ??????

Clng ? ???????? ????? ????? ????? ???????? ??????Val ????????? ?????? ??????? ??????? ?????

?????

?????????Asc ?????????? ????? ????? ??????? ?????

?????? ????? ???????? ????????? ?????????? ??????? ???

.

????? ????????? ?? ???????????? ?????

????? ????????????

.

?????? ?????? ????? ???

? ????????? ???????? ????? ??????

???

??????? ?

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:

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????

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.(???????????????????

.Ascii???????)?????? ????? ??????? ????? ????? ?????????

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

-

?????

?????? ?????

.

????? ??? ????? ??????? ?????? ????? ???

??????? ?????

.ascii??? A ???????? ??????????Asc??????? ???????

?????

: Dim v1 As Integer = 3

Dim v2 As Double = 5

v2 = v2 / v1 ???????????

??????????? ?????? ??????

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()

?????

15

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???? ???? ????? ???? ???????? ?? ?????

?????? ??????????

???????? ?? ???

https://www.doczj.com/doc/f914817142.html, ?????? ????????? ????? ??????

???????????

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.

.

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.

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16

???? ??? 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 ?????? ?????? ?????????? ???????? ??????????

???????? ??? . ?????? ??????? ?????? ?????????? ????? ???????? ?????? ????? ????? ?????? ?????? .

?????? ?????????? ??????:

????? ??????? ????????? ?????? ????? ?????? ?????????? ?????? . ????? ????? ??????????????????? ????? ???????? ????? ????????? ??? ??????

? ????????????? ????? ?? .??? ????? ????????? ????? ?????? ?????????? ?????? ??????? ?????????? ????????? ????????? ???????????.

????????. ? ???????????? ?????? ????????

Public ????? ?????? as ???? ??????? ?????? = ??????? ???????? ???????

????? ??? ?????? ???????? ?????????? ???????? ???????? .

18- ?????

??????? ????? ???????? ??????? ????? ??? .?????????? ?????? ??????? ????? ?????? ????? ???? ?????? ????? ?????? ????????? ?????

????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- ?????

?????? ??????? ?????????????? ???????? ??????????? ?????????? ???????? ??????? ??? . ????? ????? ????? ????? ??? ?????? ???? ????????????.

?? ????? ????? ????????? ????? ??????????????? ????????? ?????????????? ??????? ?????? ??????????? ?????????? ?? ???? ??????? ????.

?????? ???????? ?????? ?????????? ???? ??

????????? ?????? ??????? ?????????? ???????????function ???? ????????? ??????Sub ??????? ?????????? ? Main ????? ????? ?????? ???????? ??????????. (static) ????? ?????? ???? (const) ?????? ???????????? ??????????? ????????? ????????????????? .?????????? ???????? ????? ??????

????????? ?????? ??????? ???????? ????????? ???????? ????????????? ????? ????????? ?????????? ???????? ???? ????? ?????? ????????? ?????????? (static) ??????? ????? ????????? ??????????? ?????????? ???????? ????????? ? ?????? ????? ????? ?????? ??????????? ????? ?? ???????? ???????????

?????? ?????????? ????? ????? ?????? . ???????????? ?????? ???????? :?

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- ?????

? ??? ??????? ?? ?????? ???????? ???? ???????? ??????? ???? ???????? ??????? ??? ??????????????? ??????. ????? ???????????? ??? ???? ??????

?????? ??????? ?????????? .?????????? ??? ?? ????? ?????? ???? ???????.

(lifetime) ????????? ???????? ????????? ??????????

?????????? ?????? ??? ????? ????????? ???????? ????????? ?????????? ??????? ??? ????? ???????? ?????????????. ?????????? ?????????? ???? ?????? ?????????? ?????????? ????? ???????? ?????? ??????????? ???????? ?????. ??????? ??????????? ????????? ???????? ?????? ????? ??? ?? ????? ??????? ???????? ?????? ????? ???????? ?????????. ?????????? ????? ?????? ?? ???????? ???????? ?????????? ??????? ?????? dim ?????? .??? ?????????? ???????????? ???????? static ???????? ???????? ?????? ?? ??????? ????????? ?? ?????? ?????????? ?????? ?????????? ?????????? .????? ????

?????? ???????? ??????? ????????? ????????? ????????.???????? ???????? ???????? ???????? ????? ?????? ???? ????????????? ?????? ????? ??? ?? ???????? ??????? ?????? ?????? ?????????? ???????? ??????? private ,public ?? ????? ????????????? ?????? ????? ?????????. ???? ????????

?????????? ??????? ???????? ?????? ?????????? ???????? ??? .

?????? ?????? ????? ????? ??????????? ???????? ??????????? ?????????? ?????????? ????????.??? ?????dim, public, private, static ??????? ???

?????????? ??? ???????.

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