If...Then.. Else . If...Then
If Then
End If
ij : If , True, , Then. False, :
If Then
1
Else
2
End If
Private Sub Command1_Click()
a = 6
If a = 7 Then
Print "visual"
Else
Print "basic"
End If
End Sub
. .
Private Sub Command1_Click()
a = Val(Text1.Text)
b = Val(Text2.Text)
c = Val(Text3.Text)
Text1.Text = ""
Text2.Text = ""
Text3.Text = ""
Max = a
If b > Max Then Max = b
If c > Max Then Max = c
Print Max
Min = a
If b < Min Then Min = b
If c < Min Then Min = c
If a < Max And a > Min Then Print a
If b < Max And b > Min Then Print b
If c < Max And c > Min Then Print c
Print Min
End Sub
If 1 Then
1
ElseIf 2 Then
2
Else
3
End If
. ϳ .
Private Sub Command1_Click()
Dim z, n As Integer
z = Val(Text1.Text)
If z <= 200 Then
n = z * 0.15
ElseIf z >= 200 And z <= 500 Then
n = z * 0.2
Else
n = z * 0.28
End If
Label3.Caption = Str(n)
End Sub
, , , , . . .
30. Select Case. . .
Visual Basic Select Case, . Select Case :
Select Case
Case 1
1
Case 2
2
Case Else
End Select
Case (1), , (2, 3). (4 6) (Is >= 9). (Is=3). Case Else , .
Private Sub Command1_Click()
n = Int(Rnd * 10) + 1 { }
Select Case n
Case 1
Print " internet"
Case 2
Print ""
Case 3
Print "basic"
Case Else
Print "Ivanenko"
End Select
End Sub
31. Visual Basic. . .
|
|
|
. Visual Basic : For... Next, , Do... Loop, .
For...Next :
For ˳ = ʳ
Next ˳
˳ . ˳ 1 . (, 䒺 ) ʳ , . г , , .
: 1 10.
Private Sub Command1_Click()
For i = 1 To 10
Print i
Next i
End Sub
Exit For.
Do...Loop
, Do... Loop. Do...Loop.
,
D {While | Until}
Loop
,
Do
Loop {While | Until}
, . , , , . Do... Loop .
While...Wend
While... Wend .
While
Wend
䳿 , Do While.. Loop. Do... Loop. , While...Wend Exit.
Private Sub Command1_Click()
While x = True
Print Time
Wend
End Sub
: 20.
Private Sub Command1_Click()
For i = 1 To 9
For j = 1 To 9
For k = 1 To 9
s = i + j + k
If s = 20 Then Print i; j; k
Next k
Next j
Next i
End Sub
.
Private Sub Command1_Click()
s = 1: x = 1
n = 1: y = 0.1
f = 1
e = 0.001
While y >= e
For i = 1 To n
f = f * i
Next i
y = x ^ n / f
s = s + y
n = n + 1
f = 1
Wend
Label2.Caption = Str(s)
End Sub
