这样比较简单:
Private Sub Command1_Click()
Dim x As New Collection, a(0 To 4) As String
For i = 1 To 20
x.Add i
Next
For i = 0 To 4
Randomize
num = Int(Rnd * x.Count + 1)
a(i) = Str(x(num))
x.Remove num
Next
MsgBox Join(a(), ","), 64, "5 random number between 1 and 20"
End Sub
For i = 1 To 16
For j = i + 1 To 17
For k = j + 1 To 18
For m = k + 1 To 19
For n = m + 1 To 20
List1.AddItem i & "," & j & "," & k & "," & m & "," & n
Next
Next
Next
Next
Next
MsgBox List1.ListCount
End Sub
怎么又是一道,早说就行了呀
再看一次。先将20个数排序,然后来段程序就行了,看下面的。
for i= 1 to 20
for j= i+1 to 20
for k= j+1 to 20
for m= k+1 to 20
for n= m+1 to 20
print a[i],a[j],a[k],a[m],a[n]
next
next
next
next
next