下列程序的功能是：验证一个大于6的偶数能分解为两个素数之和基本思想是：N为大于6的任一偶数，可

Private Sub Form_Click()

Dim N%, N1%, N2%, I%, K1%, K2%

N = Val(InputBox("输入大于6的偶数"))

For N1 = 3 To N / 2 Step 2

K1 = ----1---

For I = 2 To K1 '判断N1是否是素数

If N1 Mod I = 0 Then ----2----

Next I

If I ＞ K1 Then

N2 = ----3----

K2 = Int(Sqr(N2))

For I = 2 To K2

If N2 Mod I = 0 Then Exit For

Next I

If I ＞ K2 Then Print N & "=" & N1 & "+" & N2

End If

End If

Next N1

End Sub