以前自编的关于大整数的快速除法程序

ysr

Public Function MCC4(D1 As String, D2 As String) As String ';大整数的除法
'可能还有优化和提高速度的空间
Dim ss
ss = MBJC(D1, D2)
If ss = -1 Then
MCC4 = "0" & "/" & D1
  Else
  If ss = 0 Then
   MCC4 = 1
   Else
   If Len(D1) = Len(D2) Then
Do While MBJC(D1, D2) >= 0
S1 = S1 + 1
D1 = MPC(D1, D2)
Loop
If D1 = 0 Then
MCC4 = S1
Else
    MCC4 = S1 & "/" & D1
End If
    Else
    If Len(D2) < 9 Then
     MCC4 = MCC(D1, D2)
     Else
    Dim X, Y ';定义分段长度
   
    X = Len(D1) \ 4: Y = Len(D2) \ 4
    If Len(D1) > 4 * X Then
    X = X + 1
    D1 = String(4 * X - Len(D1), "0") & D1
    ElseIf Len(D2) > 4 * Y Then
    Y = Y + 1
    D2 = String(4 * Y - Len(D2), "0") & D2
    Else
    D1 = String(4 * X - Len(D1), "0") & D1
    D2 = String(4 * Y - Len(D2), "0") & D2
    End If
  X = Len(D1) \ 4: Y = Len(D2) \ 4
Dim JW, jcc, jss, jcs

  Dim A() As String, B() As String
  
  ReDim A(1 To X)
  ReDim B(1 To Y)
  For I = 1 To X
  A(I) = Mid(D1, I * 4 - 3, 4)
  Next
  For J = 1 To Y
  B(J) = Mid(D2, J * 4 - 3, 4)
  jws = jws & A(J)
  Next
If Len(qqdl(Trim(jws))) <= Len(qqdl(D2)) Then
  jcc = Val(Left(qqdl(A(1) & A(2)), 2)) \ Val(Left(qqdl(B(1) & B(2)), 2))
  Else
  jcc = Val(Left(qqdl(A(1) & A(2)), 2 + Len(qqdl(Trim(jws))) - Len(qqdl(D2)))) \ Val(Left(qqdl(B(1) & B(2)), 2))
  End If

  jss = MbC(Trim(jcc), D2)
  
   
      Do While MBJC(Trim(jws), Trim(jss)) = -1
      jcc = jcc - 1
      jss = MbC(Trim(jcc), D2)
      Loop
  JW = MPC(Trim(jws), Trim(jss))
  
    z = X - Y
   
    Dim c() As String
    ReDim c(1 To z)
    For s = 1 To z
     If MBJC(JW & A(s + Y), D2) = -1 Then
       c(s) = "0000"
       Else
       If Len(qqdl(JW & A(s + Y))) = Len(qqdl(D2)) Then
  jwc = Val(Left(qqdl(JW & A(s + Y)), 4)) \ Val(Left(qqdl(B(1) & B(2)), 4))
  Else
  If Len(qqdl(JW & A(s + Y))) <= Len(qqdl(D2)) Then
  jwc = Val(Left(qqdl(JW & A(s + Y)), 4)) \ Val(Left(qqdl(B(1) & B(2)), 4))
  Else
  jwc = Val(Left(qqdl(JW & A(s + Y)), 4 + Len(qqdl(JW & A(s + Y))) - Len(qqdl(D2)))) / Val(Left(qqdl(B(1) & B(2)), 4))
  jwc = Format(Val(jwc), "0.000000")
  If InStr(jwc, ".") = 0 Then
  jwc = jwc
  Else
  jwc = Left(jwc, InStr(jwc, ".") - 1)
  End If
  End If
  End If
     c(s) = jwc
         End If
       jsw = MbC(Trim(c(s)), Trim(D2))
       Do While MBJC(JW & A(s + Y), Trim(jsw)) = -1
      c(s) = c(s) - 1
      jsw = MbC(Trim(c(s)), D2)
      Loop
     JW = MPC(JW & A(s + Y), MbC(Val(c(s)), D2))
     Do While MBJC(Trim(JW), Trim(D2)) >= 0
     jwc1 = jwc1 + 1
     JW = MPC(Trim(JW), Trim(D2))
     Loop
     c(s) = Val(c(s) + jwc1)
    c(s) = Right(100000000 + Val(c(s)), 4)
     
    jcc = jcc & c(s)
    Next s
    If JW = 0 Then
    MCC4 = jcc
    Else
    MCC4 = jcc & "/" & JW
    End If
   
  For I = 1 To Len(MCC4)
    If Not Mid(MCC4, I, 1) = "0" Then
        Exit For
    End If
Next
strTmp = Mid(MCC4, I)
  If Len(strTmp) = 0 Then
  MCC4 = "0"
  Else
MCC4 = strTmp
End If
   
    End If
   
  End If
End If
End If
End Function

ysr

  前面是自编的关于大整数的快速除法的程序，关于其原理的文章曾经被《读写算》杂志录用，由于需要交付版面费和投稿一等奖荣誉证书制作费合计1千多元没有给，实际可能是根本没有发。