输入：Text1=80607000,结果： 21+0i12.9497474683058+-10.9497474683058i2.00000000000001+-7i3.05025253169417+1.05025253169416i7+0i3.05025253169417+-1.05025253169417i1.99999999999999+7i12.9497474683058+10.9497474683058i.
“让那些内外反动派在我们面前发抖吧，让他们去说我们这也不行那也不行吧，中国人民不屈不挠的努力必将稳步地达到自己的目的！”
“我们的目的一定要达到，我们的目的一定能够达到！”————毛主席语录
倒序程序修改了一下就正确了：
输入：Text1=00000678,结果：80607000.
输入：Text1=00000432,结果：20403000.
代码如下：
Private Sub Command1_Click()
Dim x_() As Double, a As String
a = Trim(Text1)
ReDim x_(1 To Len(a))
For i1 = 1 To Len(a)
x_(i1) = Mid(a, Len(a) - i1 + 1, 1)
Next
Dim n As Integer, i As Long, j As Long, mn As Long, lh As Long, t As Double, k As Long
'位序倒置
n = Len(a) '求数组大小，其值必须是2的幂
lh = n / 2
j = n / 2
For i = 1 To n - 2
Debug.Print i, j
k = lh '下面是向右进位算法
Do
If k > j Then Exit Do '高位是1吗
j = j - k '是的，高位置0
k = k / 2 '准备次高位的权
Loop Until k = 0 '次高位的权若非0，则检查新的次高位
j = j + k '非则若最高位是0，则置1
Text2 = Text2 & x_(j + 1)
Next
Text2 = x_(1) & x_(1 + Len(a) / 2) & Text2
End Sub
Private Sub Command2_Click()
Text1 = ""
Text2 = ""
End Sub
Private Function qdhz0(sa As String) As String
a = sa
Do While Right(a, 1) = "0"
a = Left(a, Len(a) - 1)
Loop
If a = "" Then
a = 0
Else
a = a
End If
qdhz0 = a
End Function
Private Function qdqd0(sa As String) As String
a = sa
Do While Left(a, 1) = "0"
a = Mid(a, 2)
Loop
If a = "" Then
a = 0
Else
a = a
End If
qdqd0 = a
End Function
去掉前导0和后缀0的程序，很重要。
本帖最后由 ysr 于 2021-3-24 12:46 编辑
改进了一下除法程序，其实是把其中的大数减法可调用程序改进了一下，把其中的一维数组由一位的改为8位的，这样减法速度快了，由于除法程序大量调用大数减法，所以，速度有所提高，下面是验证结果：
9284564683560607824636349236036620084709403829405931331147437307957668341663495926748183799850251378750668211991763528582507888857722224558828540106085807378607424663142945342259084291023976378630973930107/107=86771632556641194622769619028379626959900970368279732066798479513623068613677532025683960746264031577109048710203397463387924194931983407091855515010147732510349763206943414413636301785270807276924990001有203位，用时1.476563秒。
把此程序重新发在前面，就是编辑修改了前楼的程序。
前楼的程序不改了，同样的结果，前楼居然用力不到1秒：
86771632556641194622769619028379626959900970368279732066798479513623068613677532025683960746264031577109048710203397463387924194931983407091855515010147732510349763206943414413636301785270807276924990001有203位，用时0.8671875秒。
把前楼中的大数减法可调用程序改了一下，稍快了一些：
86771632556641194622769619028379626959900970368279732066798479513623068613677532025683960746264031577109048710203397463387924194931983407091855515010147732510349763206943414413636301785270807276924990001有203位，用时0.6171875秒
9284564683560607824636349236036620084709403829405931331147437307957668341663495926748183799850251378750668211991763528582507888857722224558828540106085807378607424663142945342259084291023976378630973930107/107=86771632556641194622769619028379626959900970368279732066798479513623068613677532025683960746264031577109048710203397463387924194931983407091855515010147732510349763206943414413636301785270807276924990001有203位，用时0秒（模仿手工计算的居然不需要时间，前面快速程序是有条件的，在大于300位才能显出优势的,这里说的快速程序就是基于快速乘法程序的牛顿迭代法除法程序）
2678145490787694710138406683675886762424440548647327525594133873038347266950777818028529804877891353347244255046176220880989519574806598935727647635506939520211209794328712328126947740602255036264392628020291100698432900022333877728824270241063030019536831205264726059774673235680796770108334187808344470141093691232926021244583649747591446066921535333854157441330339217364515328375889937313870826987520723914810358707312468857074455945610038118763873992681688857200178452843740327143990247797893489008808544535536081089994800692174759199578596435124153437689121057209523619989593900355037400039597165241729693472001589594642879166693443994939359639600558001937547209387175085119128575833396037478944824322315197771750730768383267287661855880237549141571520374996029107650341071074081501632143441365461865431362023790463469688071768208320226561675630348708531708110373889241713511809029065048200924851629507265095151843687852114948736130517024578482059771284515915597919026074110811882700307150650858080695566672584075215926450360584738705106755945308199980660478183563586945902705730231409948938478910176292179410952310592864745025373902249844607078729230098512959498522851990040833671698873183076996740726479481352429756295966452788332789259316653805673821716832204368483794501474641036177256005810416507649770210480747056764697918800240201155395628561684853684747063434500664449114760179367086926249813006056735202795763742271472136500817313178050955623517148960973128433455798444839070215800699075256371341531892841721456473301085595261371522078416420399702683504171019191363372883472415693921509069484448792009627325245658854979159002549542769741504596589556474585723101403486046952706847309188488390899096649210853675228464611999630360164703837131620319658277117300208326944026347808645954842782309633205645471959842390075986572806483755223497552549948718545978420793425036666212191832327909389117021539426917904222971515424022606157676379417252939026404363841301595348953340657745965591468370831371449860774296757556463049237248472613472436666799615694672489600751763956185893123579218797539971253828850163437053164723845196089466298000486042246621634263064752906475198879616484926366053597071510886820878425907736453843197228282179943365206039514850477377542684361730162273246709577442085159313947668552462343596819299335060863266863059421286080919061657175757802930378698062290163092494909661982639303946271889619023417245433500782685534406291391527022657608608130680134939380126048353657648559735671562230714451258764762350451448379438849319710473631625533527602085050858633346936315115309333355986556546113134787213610042970405680162084678021281774169131725296977361816657904233850711837826724976507876061043779177845550646612327663283839673950405472039432309339110648301347672597370034346896334064135099613033528785924976781865447506814375627647103020761819104412269362847848884053177378762432543285984193091289854949394023586451139393716370633759317698908834326333339634557238526607966375935960004339535161203546369910853171524516945554862019134684985868547068709986010719120259421723270478586992153989283736650948010894951434857207445141886625290777550599700738909777829412358941157674866550887608199469723859806486384262574182811908513849905040209776132986875560077482527819093584150609347560543627976011009349905362597935257895287412087233810106693141683912683308201407373637490835862452911394718399632093441745957478079754723679119343225931665785380948807114301164623717144211285944154289093317610519159281033583963015810556464180819928345256832572962092994993950655913067768151113345566231088759030148164710287289335782462899525700500822021472132532771242198844498579102733028256523810973405350508253183399668290339844052874956694050028526577775764032598023622192221226501334606994447870277619118208162133562541678250491647671042612088902952091163094215645902682086024337098910110924115381788866213335441814530141911754446270296630426675020592640816713810936850961517475097707179713115856513919631998747192606018612535436009162735908155778165736923393260822217415131632296810207091918499370220533980666393617256227781299273913099896641458499949922475383775878771011361417556799406151773618626138749998464514570482965286184387350245762317271666329142667987131139265167425606863654107927682419958167046956962340419295394058625063862272314570914511355913547470055072878835349142049813368019960713974852351833144227544851625677753419141348585495260230041111323576432417502998832485027071744397105338790364666312325483218209150368759120749671419554589928540715813531144241705501211397506662448276056294585639532800634727428900861538486753011006379264618338782036690340859441153926551954112364946638768223012718907190897165613382555036872673785444132692292217184974818914501886689736449912131900762592363447945036085692999163815947845753538999001633767986447907729462453017601/
51750801837147361345408953922231823615475578427966187002956389087112242842559611794590895524485015222232340190036677951157401229518412775512617768569186939216558814320044037671525512763073762127357272238470370174050144130962253437215369727381909754581075278888137687950749577751967083233227932391898438489520107788418593104216764745143648165875043861634459264809523254076330115365651752264033578829280651927862062277153553168278640509846511729608378923480331705134467105387853440058108864733429085916392927954109944314725590758950098556991513109760871599045355054258610189920009222629391227784118536578933067532162200768112408111142115021110731900107445187734955403922470144187293970602024056652942406064101184615113779243566842311336047149767396006622923831778833173731302325162741660053390002572456069410383734906953419854919650114722834689335022576764661864630532595250136417800041415827379233503655173380741283758557001102498493237113089198106283487003030225058520047964863929279622015825870972146222540614667928697270131499340362072956956518213266361286372027834000838185920579641835952404678850816456467012890793914108776148483471455515695596694573035435841962871983614397882366460940068418989292218104650923374259244879331938925143014431488635252724366437874702141802712286424754174951797598162531093933772708024046029028652425912112434874797404878317364682580259997737809632860143160557722236459697738869857870982308547756781808568834445404196611833859447257611721058384661943492980180884154939581533269700568975940675513953240040220315659784214936947443784598154082110443748171557676558299300252057475022409541083454882202785077569281268346332901357829843950754331120530978456454396022570647840977328115888711408099894489014427119253061839770890965114853246067272044090282103668762164047374624856119676063310166566519499552342907590495696658359542582469176737197423550084705962160477441546453931948920780829433665262356431973422034925001341330921812806939990688094288773216182971976433480031438271163051341645350474631300965486818841553843112688792803367397276204832936049162335586140151875524537720425345701193713093955432559579831822084761702059241698184717469616732582600658006352069963017377661059372648121969448644394344799369193952197519795756182552461838014896498816263546256621347748100920475049252091842372001283217811864786225692344297842649982716736752004086642881662614773154743879410328420184057019873899911520017723788801=
51750801837147361345408953922231823615475578427966187002956389087112242842559611794590895524485015222232340190036677951157401229518412775512617768569186939216558814320044037671525512763073762127357272238470370174050144130962253437215369727381909754581075278888137687950749577751967083233227932391898438489520107788418593104216764745143648165875043861634459264809523254076330115365651752264033578829280651927862062277153553168278640509846511729608378923480331705134467105387853440058108864733429085916392927954109944314725590758950098556991513109760871599045355054258610189920009222629391227784118536578933067532162200768112408111142115021110731900107445187734955403922470144187293970602024056652942406064101184615113779243566842311336047149767396006622923831778833173731302325162741660053390002572456069410383734906953419854919650114722834689335022576764661864630532595250136417800041415827379233503655173380741283758557001102498493237113089198106283487003030225058520047964863929279622015825870972146222540614667928697270131499340362072956956518213266361286372027834000838185920579641835952404678850816456467012890793914108776148483471455515695596694573035435841962871983614397882366460940068418989292218104650923374259244879331938925143014431488635252724366437874702141802712286424754174951797598162531093933772708024046029028652425912112434874797404878317364682580259997737809632860143160557722236459697738869857870982308547756781808568834445404196611833859447257611721058384661943492980180884154939581533269700568975940675513953240040220315659784214936947443784598154082110443748171557676558299300252057475022409541083454882202785077569281268346332901357829843950754331120530978456454396022570647840977328115888711408099894489014427119253061839770890965114853246067272044090282103668762164047374624856119676063310166566519499552342907590495696658359542582469176737197423550084705962160477441546453931948920780829433665262356431973422034925001341330921812806939990688094288773216182971976433480031438271163051341645350474631300965486818841553843112688792803367397276204832936049162335586140151875524537720425345701193713093955432559579831822084761702059241698184717469616732582600658006352069963017377661059372648121969448644394344799369193952197519795756182552461838014896498816263546256621347748100920475049252091842372001283217811864786225692344297842649982716736752004086642881662614773154743879410328420184057019873899911520017723788801用时63.59375秒（经过改进，这个除法程序速度有所提高）
'这个程序的代码如下：
Private Sub Command1_Click() '快速除法程序
Dim a, B
a = Trim(Text1): B = Trim(Text2): b3 = B: a3 = a
ts = Timer
If Len(B) = 1 Then
X1 = Mid(B, 1, 1): X2 = 1 / X1 - 0.01
Else
X1 = Mid(B, 1, 2): X2 = 10 / X1 - 0.01
End If
x = Mid(X2, 1, 4)
Y = 0: x3 = 0
sb = Len(a3) + Len(b3) - 1 + 10
If Len(a3) = Len(b3) And MBJC(Trim(a3), Trim(b3)) = 0 Then
a1 = 1
ElseIf MBJC(Mid(a3, 1, Len(b3)), Trim(b3)) = 0 And Val(Len(qdhz0(Trim(a3)))) = Val(Len(b3)) Then
a1 = 1 & String(Len(a3) - Len(qdhz0(Trim(a3))), "0")
Else
a = a & String(10, "0"): B = B & String(10 + Len(a3), "0")
x = qdqd0(ydxsd(Trim(x), Val(sb)))
Y1 = 2 & String(Val(sb), "0")
Do While MBJC(MPC(Trim(x), Trim(x3)), 1) >= 0
s3 = s3 + 1
Y = mbc2(Trim(x), MPC(Trim(Y1), mbc2(Trim(B), Trim(x), Val(sb))), Val(sb))
x3 = x
x = Trim(Y)
Loop
a1 = mbc2(Trim(Y), Trim(a), Val(sb))
s = Len(a3) - Len(b3)
a1 = qdqd0(Trim(a1))
If MBJC(Mid(a3, 1, Len(b3)), Trim(b3)) < 0 Then
a1 = tjxsd(Trim(a1), Len(a1) - s)
Else
a1 = tjxsd(Trim(a1), Len(a1) - s - 1)
End If
End If
If InStr(a1, ".") = 0 Then
a1 = a1
Else
a1 = Left(a1, InStr(a1, ".") - 1)
End If
ja = MPC(Trim(a3), MbC(Trim(b3), Trim(a1)))
Do While MBJC(Trim(ja), Trim(b3)) >= 0
ja = MPC(Trim(ja), Trim(b3))
s5 = s5 + 1
Loop
a1 = MPC1(Trim(a1), Trim(s5))
If ja = 0 Then
Text3 = a1 & "用时" & Timer - ts & "秒，有" & Len(a1) & "位"
Else
Text3 = a1 & "/" & ja & "用时" & Timer - ts & "秒，整数部分有" & Len(a1) & "位"
End If
End Sub
Private Sub Command2_Click()
Text1 = ""
Text2 = ""
Text3 = ""
End Sub
Private Function mbc2(sa As String, sb As String, sd As String) As String 'chengfa jingdu
Dim ja
If Trim(sa) = 0 Or Trim(sb) = 0 Then
mbc2 = 0
Else
ja = MbC(Trim(sa), Trim(sb))
If Val(Len(ja)) > Val(sd) Then
jb = Left(ja, Val(Len(ja)) - Val(sd))
mbc2 = jb
Else
mbc2 = 0
End If
End If
End Function
Private Function qdhz0(sa As String) As String
a = sa
Do While Right(a, 1) = "0"
a = Left(a, Len(a) - 1)
Loop
If a = "" Then
a = 0
Else
a = a
End If
qdhz0 = a
End Function
Private Function qdqd0(sa As String) As String
a = sa
Do While Left(a, 1) = "0"
a = Mid(a, 2)
Loop
If a = "" Then
a = 0
Else
a = a
End If
qdqd0 = a
End Function
Private Function tjxsd(sa As String, sd As String) As String
If Val(Len(sa)) > Val(sd) Then
tjxsd = Left(sa, Val(Len(sa)) - Val(sd)) & "." & Mid(sa, Val(Len(sa)) - Val(sd) + 1)
Else
If Val(Len(sa)) = Val(sd) Then
tjxsd = "0." & sa
Else
tjxsd = "0." & String(Val(sd) - Val(Len(sa)), "0") & Trim(sa)
End If
End If
End Function
Private Function ydxsd(sa As String, sd As String) As String
If Len(sa) = 1 And Val(sa) = 0 Then
ydxsd = 0
Else
sc = InStr(sa, ".")
If Val(sc) = 0 Then
ydxsd = sa & String(sd, "0")
Else
se = Left(sa, Val(sc) - 1)
sf = Right(sa, Len(sa) - Val(sc))
If Val(Len(sf)) >= Val(sd) Then
ydxsd = se & Mid(sf, 1, sd)
Else
ydxsd = se & sf & String(Val(sd) - Len(sf), "0")
End If
End If
End If
End Function
Public Function MbC(D1 As String, D2 As String) As String
Dim j1&, j2&, e&, d&, E1&, m, n
' 按列法计算C=A*B
m = Trim(D1): n = Trim(D2)
x = Len(m) \ 4: Y = Len(n) \ 4
m = String(4 * x + 4 - Len(m), "0") & m
n = String(4 * Y + 4 - Len(n), "0") & n
x = x + 1: Y = Y + 1
Dim a(), B()
ReDim a(1 To x): ReDim B(1 To Y)
For i1 = 1 To x
a(i1) = Val(Mid(m, i1 * 4 - 3, 4))
Next
For i2 = 1 To Y
B(i2) = Val(Mid(n, i2 * 4 - 3, 4))
Next
ma = x: mb = Y
MC = ma + mb
ReDim c(MC)
E1 = 0
j1 = ma: j2 = ma
For I = MC To 2 Step -1
If I <= ma Then j2 = I - 1
e = E1: E1 = 0
For J = j1 To j2
e = e + a(J) * B(I - J)
If e > 2040000000 Then '减少进位次数
e = e - 2040000000
E1 = E1 + 204000
End If
Next J
If j1 > 1 Then j1 = j1 - 1
base = 10000
d = e \ base
c(I) = e - d * base
If Len(c(I)) < 4 Then
c(I) = String(4 - Len(c(I)), "0") & c(I)
Else
c(I) = c(I)
End If
jc = c(I) & jc
E1 = E1 + d
Next I
jc = d & jc
MbC = qdqd0(Trim(jc))
End Function
Public Function MPC(D1 As String, D2 As String) As String ';jianfaqi
Dim x, Y ';两数长度
If qdqd0(D2) = "0" Then
MPC = D1
Else
If Len(D1) >= Len(D2) Then
d4 = String(Len(D1) - Len(D2), "0") & D2
d3 = D1
Else
d4 = D2
d3 = String(Len(D2) - Len(D1), "0") & D1
End If
x = Len(d3) \ 8: Y = Len(d4) \ 8
d3 = String(8 * x + 8 - Len(d3), "0") & d3
d4 = String(8 * Y + 8 - Len(d4), "0") & d4
x = x + 1: Y = Y + 1
Dim a() As String, B1() As String, C1() As String, E1() As String
ReDim a(1 To x)
ReDim B1(1 To Y)
ReDim C1(1 To x)
ReDim E1(1 To x)
Dim I, J, C2, CJ, jw
For J = Y To 1 Step -1 ';D2
jw = 1 ';yu jie weichuzhi
B1(J) = Mid(d4, J * 8 - 7, 8) ';每位数
For I = x To 1 Step -1';D1
a(I) = Mid(d3, I * 8 - 7, 8) ';每位数
C1(I) = Val(1 & a(I)) - Val(B1(I)) - Val(1) + Val(jw) ';计算jia
If Len(C1(I)) <= 8 Then
jw = 0
C1(I) = String(8 - Len(C1(I)), "0") & C1(I)
Else
jw = Left(C1(I), Len(C1(I)) - 8)
End If
E1(I) = Right(C1(I), 8)
If Len(E1(I)) < 8 Then
E1(I) = String(8 - Len(E1(I)), "0") & E1(I)
Else
E1(I) = E1(I)
End If
Next
Next
For r = 1 To x
MPC = MPC & E1(r)
If Len(MPC) > Len(D1) Then
MPC = Mid(MPC, Len(MPC) - Len(D1) + 1)
Else
MPC = MPC
End If
For I = 1 To Len(MPC)
If Not Mid(MPC, I, 1) = "0" Then
Exit For
End If
Next
strTmp = Mid(MPC, I)
If Len(strTmp) = 0 Then
MPC = "0"
Else
MPC = strTmp
End If
Next
End If
End Function
Public Function MPC1(D1 As String, D2 As String) As String 'jiafa
Dim x, Y, jw '两数长度
If qdqd0(D1) = "0" Then
MPC1 = D2
ElseIf qdqd0(D2) = "0" Then
MPC1 = D1
Else
If Len(D1) >= Len(D2) Then
d4 = String(Len(D1) - Len(D2), "0") & D2
d3 = D1
Else
d4 = D2
d3 = String(Len(D2) - Len(D1), "0") & D1
End If
x = Len(d3) \ 8: Y = Len(d4) \ 8
If 8 * x < Len(d3) Then
d3 = String(8 * x + 8 - Len(d3), "0") & d3
d4 = String(8 * Y + 8 - Len(d4), "0") & d4
x = x + 1: Y = Y + 1
Else
x = x: Y = Y
d3 = d3: d4 = d4
End If
Dim a() As String, B1() As String, C1() As String, E1() As String
ReDim a(1 To x)
ReDim B1(1 To Y)
ReDim C1(1 To x)
ReDim E1(1 To x)
Dim I, J, C2, CJ
For J = Y To 1 Step -1 'D2
jw = 0 '进位清0
B1(J) = Mid$(d4, J * 8 - 7, 8) '每位数
For I = x To 1 Step -1'D1
a(I) = Mid$(d3, I * 8 - 7, 8) '每位数
C1(I) = Val(a(I)) + Val(B1(I)) + Val(jw) '计算jia
If Len(C1(I)) < 8 Then
C1(I) = String(8 - Len(C1(I)), "0") & C1(I)
Else
C1(I) = C1(I)
End If
jw = Left(C1(I), Len(C1(I)) - 8)
E1(I) = Right(C1(I), 8)
Next
Next
For r = 1 To x
If jw = 0 Then
MPC1 = MPC1 & E1(r)
Else
jc = jc & E1(r)
MPC1 = jw & jc
End If
Next
MPC1 = qdqd0(Trim(MPC1))
End If
End Function
Public Function MBJC(D1 As String, D2 As String) As String ';bijiao
If Len(D1) <= 10 And Len(D2) <= 10 Then
If Val(D1) > Val(D2) Then
MBJC = 1
Else
If Val(D1) = Val(D2) Then
MBJC = 0
Else
MBJC = -1
End If
End If
Else
If Len(D1) > Len(D2) Then
MBJC = 1
Else
If Len(D1) < Len(D2) Then
MBJC = -1
Else
If Len(D1) = Len(D2) Then
Dim x, Y
x = Len(D1) \ 4: Y = Len(D2) \ 4
Dim a() As String, B() As String
ReDim a(4 To 4 * x + 4)
ReDim B(4 To 4 * Y + 4)
If Val(Left(D1, Len(D1) - 4 * x)) > Val(Left(D2, Len(D2) - 4 * Y)) Then
MBJC = 1
Else
If Val(Left(D1, Len(D1) - 4 * x)) < Val(Left(D2, Len(D2) - 4 * Y)) Then
MBJC = -1
Else
For I = 4 To 4 * x Step 4
a(I) = Mid(D1, Len(D1) - I + 1, 4)
B(I) = Mid(D2, Len(D2) - I + 1, 4)
Next
J = 4 * x
Do While a(J) = B(J) And J >= 8
J = J - 4
Loop
If Val(a(J)) - Val(B(J)) > 0 Then
MBJC = 1
Else
If Val(a(J)) - Val(B(J)) < 0 Then
MBJC = -1
Else
MBJC = 0
End If
End If
End If
End If
End If
End If
End If
End If
End Function