哥德巴赫猜想

[vb]代码库

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 = Int(Sqr(N1))

   For I = 2 To K1    '判断N1是否是素数
      If N1 Mod I = 0 Then Exit For
   Next I

   If I > K1 Then   '如果N1为素数，将N分解为N1+N2
      N2 = N - N1
      K2 = Int(Sqr(N2))  
      For I = 2 To K2   '判断N2是否是素数
        If N2 Mod I = 0 Then Exit For
      Next I
      If I > K2 Then   ' 如果N2也为素数，则打印输出
       Print N & "=" & N1 & "+" & N2
    End If
   End If
  Next N1