VB上机试题及答案

______________________________________________________________________________________________________________精品资料上机操作练习题1．某数组有20个元素，其值为随机产生的两位整数。现要求将前10个元素与后10个元素对换。即第1个元素与第20个元素互换，第2个数与第19个元素互换，…，第10个元素与第11个元素互换。在窗体上输出数组原来各元素的值与对换后各元素的值。OptionexplicitDima(1to20)asinteger,Iasinteger,jasinteger,tasintegerPrivateSubForm_Load()ShowPrint"原始数组是："RandomizeFori=1To20a(i)=Int(Rnd*90)+10Printa(i);IfiMod10=0ThenPrintNextiPrintPrint"现在数组是："Fori=1To10j=21-it=a(i):a(i)=a(j):a(j)=tNextiFori=1To20Printa(i);IfiMod10=0ThenPrintNextiEndSub2．从数组中删除一个数。先定义一个一维数组，大小、数组的值自定。从键盘上输入一个数，若这个数在数组当中，就把它删除；若这个数不在数组中，提示“该数不在数组中”注意：1）如果数组中存在多个与该数相同的元素，每一个都能删除；2）能实现多次删除PrivateSubForm_Load()ShowReDima(9)AsIntegerm=1Print"原来数组为："Fori=0To9a(i)=InputBox("请输入第"&m&"个数：")Printa(i);m=m+1NextiPrintn=InputBox("查找的数是：")i=0:flag=FalseDoIfa(i)=nThenj=i:flag=TrueFork=jToUBound(a)-1a(k)=a(k+1)NextkReDimPreservea(UBound(a)-1)i=i-1EndIfi=i+1LoopWhile(i<=UBound(a))Ifflag=FalseThenMsgBoxn&"不在该数组中"ElsePrint"删除"&n&"后的数组是:"Fori=0ToUBound(a)Printa(i);NextiEndIfEndSub3．数组a中存放着升序排列的数据，使用array赋值，将inputbox输入的新数插入到数组中，插入后数组仍有序。注意：要求利用动态数组，能够实现多次插入PrivateSubForm_Load()Shown=8:ReDima(n)a=Array(5,15,23,52,68,88,90,99)n=n+1:ReDimPreservea(n)m=InputBox("请输入要插入的数据:")Fori=1Ton-1Ifm<a(i)ThenExitForNextiFork=nToi+1Step-1a(k)=a(k-1)Nextka(k)=mFori=1TonPrinta(i);NextiPrintEndSub4．6个评委为4位歌手打分，分数介于1-100之间。去掉一个最高分，一个最低分，求出每位选手的最后得分。将4位歌手得分从高到低排列输出，同时输出该选手的编号。如：歌手395分歌手187分歌手480分歌手270分OptionBase1PrivateTypegeshouxuhaoAsStringfenshu(6)AsIntegerscoreAsIntegerpingjunAsIntegerEndTypeDimsinger(1To4)AsgeshouPrivateSubCommand1_Click()Fori=1To4Forj=1To6singer(i).fenshu(j)=Int(Rnd*100)singer(i).xuhao="歌手"&iNextNextCallpaixuEndSubPrivateSubpaixu()DimpAsgeshouFori=1To4Forj=1To5Fork=jTo6Ifsinger(i).fenshu(j)>singer(i).fenshu(k)Thent=singer(i).fenshu(j)singer(i).fenshu(j)=singer(i).fenshu(k)singer(i).fenshu(k)=tEndIfNextNextNextFori=1To4Forj=2To5singer(i).score=singer(i).score+singer(i).fenshu(j)Nextsinger(i).pingjun=singer(i).score/4NextFori=1To3Forj=iTo4Ifsinger(i).score<singer(j).scoreThenp=singer(i):singer(i)=singer(j):singer(j)=pEndIfNextNextFori=1To4Printsinger(i).xuhao&"得分："&singer(i).pingjunNextEndSubPrivateSubForm_Load()EndSub10个评委给10个选手打分PrivateSubForm_Load()Shown=UBound(b)Fori=1To10Forj=1To10a(i,j)=Val(InputBox("请第"&j&"位评委给第"&i&"位选手打分："))NextjNextiFori=1To10max=a(i,1):sum=0min=a(i,1):ave=0Forj=1To10Ifa(i,j)>maxThenmax=a(i,j)Ifa(i,j)<minThenmin=a(i,j)sum=sum+a(i,j)Nextjave=(sum-max-min)/(n-2)b(i)=aveNextiFori=1Ton-1Forj=i+1TonIfb(i)<b(j)Thent=b(i):b(i)=b(j):b(j)=tEndIfNextjNextiPrint"选手的得分由高到低为："Fori=1To10Printb(i);NextiEndSub5．编写函数求一元二次方程ax2+bx+c=0的解。注意：要求考虑方程有两相等实根、两不等实根和两个虚根的情况。DimaAsSingle,bAsSingle,cAsSingleDimsAsSinglea=InputBox("请输入a")b=InputBox("请输入b")c=InputBox("请输入c")s=b^2-4*a*cIfs<0ThenMsgBox("方程无解")ElseIfs=0ThenPrint-b/2*aElsePrint((-b)+Sqr(s))/2*a&""&((-b)-Sqr(s))/2*aEndIfEndSub6.任意输入一组字符，统计出大写字母多少个，小写字母多少个，数字多少个？要求用过程实现。Calltongji(a,n,m,o)Print"数字："&n&Chr(13)&"小写："&m&Chr(13)&"大写："&oEndSubPrivateSubtongji(aAsString,nAsInteger,mAsInteger,pAsInteger)Fori=1ToLen(a)IfAsc(Mid(a,i,1))>47AndAsc(Mid(a,i,1))<58Thenn=n+1ElseIfAsc(Mid(a,i,1))>96AndAsc(Mid(a,i,1))<123Thenm=m+1ElseIfAsc(Mid(a,i,1))>64AndAsc(Mid(a,i,1))<91Thenp=p+1EndIfNextEndSub7．随机产生一个5*5的矩阵，将主对角线和次对角线元素都置为1，并求出矩阵的四周元素之和，显示在列表框中。OptionBase1PrivateSubForm_Load()Dima(5,5)AsIntegerDimsAsIntegerFori=1To5Forj=1To5Ifi=jOri=6-jThena(i,j)=1Elsea(i,j)=Int(Rnd*1000)EndIfText1.Text=Text1.Text&""&a(i,j)s=s+a(i,j)NextText1.Text=Text1.Text&vbCrLf&vbCrLfNextList1.AddItem(s)EndSub8．编写一个函数，能将字母按下列规律译成密码：A<-->Za<-->zB<-->Yb<-->y即第1个字母与第26个字母互换，第i个字母与第(26-i+1)个字母互换。在文本框中任意输入一个字符串，调用该函数将密码显示在另一个文本框中。PrivateSubCommand1_Click()Dims1AsStrings1=Text1.TextText2.Text=convert(s1)EndSubPrivateFunctionconvert(s1AsString)AsStringFori=1ToLen(s1)IfAsc(Mid(s1,i,1))<91AndAsc(Mid(s1,i,1))>64Thenconvert=convert&Chr(91-Asc(Mid(s1,i,1))+64)ElseIfAsc(Mid(s1,i,1))<123AndAsc(Mid(s1,i,1))>96Thenconvert=convert&Chr(123-Asc(Mid(s1,i,1))+96)EndIfNextEndFunction9．编写2个函数，分别求两个正整数的最大公约数和最小公倍数，用户任意输入两个数，采用函数嵌套调用，该函数将它们在窗体显示。PrivateSubForm_Load()Text1="":Text2=""EndSubPrivateSubText1_KeyPress(KeyAsciiAsInteger)IfKeyAscii=13ThenText2.SetFocusEndSubPrivateSubText2_KeyPress(KeyAsciiAsInteger)DimmAsInteger,nAsInteger,rAsInteger,tAsInteger,xClsIfKeyAscii=13Thenm=Text1.Textn=Text2.TextIfm<nThent=m:m=n:n=tEndIfr=mModnWhiler<>0m=n:n=r:r=mModnWendPrintIfm<0Orn<0Thenx=MsgBox("请输入正数",vbCritical+vbOKCancel)Ifx=vbCancelThenEndElseText1="":Text2=""Text1.SetFocusEndIfElsePrintText1.Text&"和"&Text2.Text&"的最大公约数是：";nEndIfEndIfEndSub10.编写计算阶乘的Function过程，利用ex的下列公式计算e（直到最后一项小于10-6为止）的近似值。ex≈1+x/1!+x2/2!+x3/3!+…+xn/n!

OptionExplicitPrivateSubForm_Load()ShowDimxAsInteger,nAsInteger,sAsDoublex=InputBox("请输入一个数：")n=1:s=1Dos=s+x^n/(jiecheng(n))n=n+1LoopUntilx^n/(jiecheng(n))<10^(-6)PrintsEndSubPublicFunctionjiecheng(nAsInteger)AsDoubleDimiAsInteger,sAsDoubles=1Fori=1Tons=s*iNextijiecheng=sEndFunction11．输入整数N，显示具有N行的杨辉三角形，要求按正三角形的形式在图片框中显示。OptionExplicitPrivateSubForm_Load()WindowState=2ShowDima(),nAsInteger,iAsInteger,jAsInteger,gAsInteger,eAsIntegern=InputBox("请输入一个数：")ReDima(n,n)e=80Fori=1Tone=e-5:g=eForj=1TonIfj>iThena(i,j)=0ElseIfi=jThena(i,j)=1Elsea(i,j)=a(i-1,j)+a(i-1,j-1)EndIfEndIfIfa(i,j)=0ThenExitForElsePicture1.PrintTab(g);a(i,j);g=g+10EndIfNextjPicture1.PrintNextiEndSubPrivateSubPicture1_Click()EndSub12．编写一个过程，输出以下菱形图形：ABBBCCCCCDDDDDDDCCCCCBBBA主程序输入一个奇数（>＝3），调用过程在窗体上输入图形。PrivateSubCommand1_Click()DimnAsIntegern=InputBox("")IfnMod2=0Orn<=3ThenMsgBox("错误")ElseCalldraw(n)EndIfEndSubSubdraw(nAsInteger)Fori=1To(n+1)/2s=Chr(64+i)PrintTab(41-i+1);String(2*(i-1)+1,s)Nextc=1Forj=(n-1)/2To1Step(-1)c=c+1s=Chr(64+i-c)PrintTab(41-i+c+1);String(2*(j-1)+1,s)NextEndSub13．编写一个将十进制转换为二进制字符串输出的函数。调用函数计算用户输入一个十进制数，在文本框中输出二进制值。注意：输入数据为负数，应该将符号位输出如-13结果-1101OptionBase1Dima()PrivateFunctionconvert(y)AsStringDimiAsIntegeri=1ReDima(i)x=Abs(y)DoWhilex<>0ReDimPreservea(i)a(i)=xMod2Ifa(i)=1Thenx=(x-1)/2Elsex=x/2EndIfi=i+1LoopReDimPreservea(UBound(a))Ify<0ThenFori=1ToUBound(a)convert=convert&a(i)Nextconvert="-"&convertElseFori=1ToUBound(a)convert=convert&a(i)NextEndIfEndFunctionPrivateSubCommand1_Click()DimyAsIntegerText1.Text=""y=InputBox("请输入十进制数字")Text1.Text=convert(y)EndSubPrivateSubForm_Load()EndSub14．输入一个整数N，产生N个随机数（范围1—10*N），然后采用任何2种算法实现由小到大的排序。将排序前后的数据显示出来。OptionBase1PrivateSubCommand1_Click()Dima()AsInteger,nAsIntegern=InputBox("请输入数列项数")ReDima(n)Fori=1Tona(i)=Int(Rnd*10*n+1)Printa(i);NextPrintReDimPreservea(n)Fori=1Ton-1Forj=i+1TonIfa(i)>a(j)Thent=a(i):a(i)=a(j):a(j)=tEndIfNextNextReDimPreservea(n)Fori=1TonPrinta(i);NextEndSubPrivateSubCommand2_Click()Dima()AsInteger,nAsIntegern=InputBox("请输入数列项数")ReDima(n)Fori=1Tona(i)=Int(Rnd*10*n+1)Printa(i);NextPrintReDimPreservea(n)Fori=1Ton-1Forj=1Ton-iIfa(j)>a(j+1)Thent=a(j):a(j)=a(j+1):a(j+1)=tEndIfNextNextReDimPreservea(n)Fori=1TonPrinta(i);NextEndSubPrivateSubForm_Load()EndSub15．编写程序，在窗体上输出3~100之间的所有素数。要求每行显示4个数。PrivateSubCommand1_Click()DimfAsBoolean,cAsIntegerFori=3To100f=FalseForj=2ToInt(Sqr(i))IfiModj=0Thenf=True:ExitForEndIfNextIff=FalseThenPrinti;c=c+1IfcMod4=0ThenPrintEndIfEndIfNextEndSubPrivateSubForm_Load()EndSub16．把文本框1、文本框2指定的范围内的所有素数添加到列表框中，并选中列表框数据中最后一位是9的所有数据(设定selected属性)，把它们的和值输出。PublicaAsIntegerPrivateFunctionfact(n)AsLongIfn=1Thenfact=1ElseIfn=2Thenfact=1Else:fact=fact(n-2)+fact(n-1)EndIfEndFunctionPrivateSubCommand1_Click()n=InputBox("请输入n")Printfact(n)EndSubPrivateFunctions(n)AsLongs1=1:s2=1Fori=1Ton-2s=s1+s2:t=s2:s2=s:s1=tNextEndFunctionPrivateSubCommand2_Click()n=InputBox("请输入n")Prints(n)EndSub17.编写2个函数，分别采用递归法和递推法求斐波纳契数列的第n个月的兔子数，n使用inputbox输入，调用函数的结果在窗体上显示。PrivateSubCommand1_Click()List1.ClearDimiAsIntegerFori=Val(Text1.Text)ToVal(Text2.Text)Ifisprime(i)=TrueThenList1.AddItem(i)c=c+1IfiMod10=9ThenList1.Selected(c-1)=Trues=s+iEndIfEndIfNextPrintsEndSubFunctionisprime(nAsInteger)isprime=TrueFori=2Ton-1IfnModi=0Thenisprime=FalseExitForEndIfNextEndFunction18DimsumAsLongPrivateSubCommand1_Click()DimiAsInteger,jAsInteger,a(40)AsLonga(1)=1a(2)=1Fori=3To40a(i)=a(i-1)+a(i-2)Nextisum=0Forj=1To40sum=sum+a(j)NextjEndSubPrivateSubCommand2_Click()Open"out18.txt"ForOutputAs#1Print#1,"数列1，1，2，3，5，8…的前四十项的之和是："Print#1,sumClose#1EndSub百钱买百鸡OptionExplicitPrivateSubCommand1_Click()DimaAsInteger,bAsIntegerFora=1To34Forb=1To20If3*a+5*b+(100-a-b)/3=100ThenPrinta;Printb;Print100-a-bEndIfNextbNextaEndSub分钱作业PrivateSubCommand1_Click()DimaAsSingle,bassingle,cassinglea=Text1.Textb=Fix(a/100)Print"100元：";Printbc=a-100*bb=Fix(c/50)Print"50元：";Printbc=c-b*50b=Fix(c/20)Print"20元：";Printbc=c-20*b******************b=Fix(c/0.05)Print"0.05元：";Printbc=c-0.05*bb=Fix((c+0.005)/0.02)Print"0.02元：";Printbc=c-0.02*bb=Fix(c/0.01)Print"0.01元：";PrintbEndSub最大公约数、最小公倍数OptionExplicitPrivateSubCommand1_Click()DimaAsInteger,bAsInteger,cAsInteger,tAsIntegera=InputBox("请输入第一个数：")b=InputBox("请输入第二个数：")Ifa<bThenc=bb=aa=cEndIft=aModbDoWhilet<>0a=bb=tt=aModbLoopIfb=1ThenMsgBox("无最大公约数")ElseMsgBox("最大公约数是："&b)EndIfEndSubPrivateSubCommand2_Click()DimaAsInteger,bAsInteger,cAsInteger,tAsInteger,mAsInteger,nAsIntegera=InputBox("请输入第一个数：")b=InputBox("请输入第二个数：")Ifa<bThenc=bb=aa=cEndIft=a*bm=aModbDoWhilem<>0a=bb=mm=aModbLoopn=t\bMsgBox("最小公倍数是："&n)EndSub输出九九表OptionExplicitPrivateSubCommand1_Click()DimaAsInteger,bAsIntegerPrintFora=1To9Forb=1ToaPrintTab(b*9);a&"*"&b;"=";a*b;NextbPrintNextaEndSub排序OptionExplicitOptionBase1Dima(1To10)AsIntegerPrivateSubCommand1_Click()DimiAsInteger,jAsIntegerRandomizeFori=1To10aaa:a(i)=Int(Rnd()*90+10)Forj=1Toi-1Ifa(i)=a(j)ThenGoToaaaEndIfNextjNextiFori=1To10Printa(i);NextiPrintEndSubPrivateSubCommand2_Click()DimiAsInteger,jAsInteger,tAsIntegerFori=1To9Forj=1+iTo10Ifa(i)>a(j)Thent=a(j)a(j)=a(i)a(i)=tEndIfNextjNextiFori=1To10Printa(i);NextiPrintEndSubPrivateSubCommand3_Click()DimiAsInteger,jAsInteger,tAsIntegerFori=1To9Forj=1To10-iIfa(j)>a(j+1)Thent=a(j+1)a(j+1)=a(j)a(j)=tEndIfNextjNextiFori=1To10Printa(i);NextiPrintEndSub求平方根OptionExplicitPrivateSubCommand1_Click()DimaAsDouble,bAsDouble,cAsDouble,iAsDoublea=0c=Text1.Textb=cDoWhileAbs(((a+b)/2)^2-c)>10^(-5)i=(a+b)/2Ifi^2-c>0Thenb=iElseIfi^2-c=0ThenExitDoElsea=iEndIfLoopMsgBox(i)EndSub闰年OptionExp