vb中几种循环

Private Sub Command1_Click()

Cls

Dim n As Integer

Dim s As Integer

Dim a(10) As Integer

n = 1

While n <= 10

a(n) = Int(Rnd * 1000)

n = n + 1

Wend

n = 1

While n <= 10

Print a(n)

n = n + 1

Wend

s = 0

n = 1

While n <= 10

s = s + a(n)

n = n + 1

Wend

Print s

End Sub

2.

Private Sub Command1_Click()

Dim i As Integer

Dim sum As Integer

Dim a As Integer

Do

Randomize

a = Int(Rnd * 1000)

sum = sum + a

i = i + 1

Loop Until i > 10

MsgBox "10个随机数得和:" & sum

End Sub

3.

Private Sub Command1_Click()

Dim i As Integer

Dim sum As Integer

Dim a As Integer

Do

Randomize

a = Int(Rnd * 1000)

sum = sum + a

i = i + 1

Loop while i <= 10

MsgBox "10个随机数得和:" & sum

End Sub

4.

Private Sub Command1_Click()

Dim i As Integer

Dim sum As Integer

Dim a As Integer

i = 1

Do While i <= 10

Randomize

a = Int(Rnd * 1000)

sum = sum + a

i = i + 1

Loop

MsgBox "10个随机数得和:" & sum

End Sub

5.

Private Sub Command1_Click()

Dim i As Integer

Dim sum As Integer

Dim a As Integer

i = 1

Do Until i > 10

Randomize

a = Int(Rnd * 1000)

sum = sum + a

i = i + 1

Loop

MsgBox "10个随机数得和:" & sum

End Sub

6.

Private Sub Command1_Click()

Cls

Print f(10)

End Sub

Private Function f(x As Integer) As Long

If x = 1 Then

f = x

Else

f = x + f(x - 1)

End If

End Function

7.

Private Sub Command1_Click()

Dim sum As Integer

Dim i As Integer

Dim a As Integer

sum = 0

For i = 1 To 10

Randomize

a = Int(1000 * Rnd)

sum = sum + a

Next

MsgBox "10个随机数得和:" & sum

End Sub

8.

Private Sub Command1_Click()

Cls

Dim n As Integer

Dim s As Integer

Dim a(10) As Integer

n = 1

While n <= 10

a(n) = Int(Rnd * 1000)

n = n + 1

Wend

n = 1

While n <= 10

Print a(n)

n = n + 1

Wend

s = 0

n = 1

For Each t In a

s = s + t

Next

Print s

End Snd