中國海洋大學(xué)VB上機(jī)試題

1、1某數(shù)組有20個元素，其值為隨機(jī)產(chǎn)生的兩位整數(shù)?，F(xiàn)要求將前10個元素與后10個元素對換。即第1個元素與第20個元素互換，第2個數(shù)與第19個元素互換，第10個元素與第11個元素互換。在窗體上輸出數(shù)組原來各元素的值與對換后各元素的值。Option ExplicitDim a(1 To 20) As Integer, i As Integer, j As Integer, t As IntegerPrivate Sub Form_Load()me.ShowPrint 原始數(shù)組是：RandomizeFor i = 1 To 20 a(i) = Int(Rnd * 90+10) 10 to 99 Pri

2、nt a(i); If i Mod 10 = 0 Then PrintNext iPrintPrint 現(xiàn)在數(shù)組是：For i = 1 To 10 j = 21 - i t = a(i): a(i) = a(j): a(j) = tNext i For i = 1 To 20 Print a(i); If i Mod 10 = 0 Then Print Next iEnd Sub2從數(shù)組中刪除一個數(shù)。先定義一個一維數(shù)組，大小、數(shù)組的值自定。從鍵盤上輸入一個數(shù)，若這個數(shù)在數(shù)組當(dāng)中，就把它刪除；若這個數(shù)不在數(shù)組中，提示“該數(shù)不在數(shù)組中”注意：1）如果數(shù)組中存在多個與該數(shù)相同的元素，每一個都能刪除；

3、2）能實現(xiàn)多次刪除Dim a() As IntegerPrivate Sub Command1_Click()Dim i As Integer, j As Integer, n As Integer, k As Integer, m As Integer, flag As Booleann = InputBox(查找的數(shù)是：)i = 0: flag = FalseDo If a(i) = n Then j = i: flag = True For k = j To UBound(a) - 1 a(k) = a(k + 1) Next k ReDim Preserve a(UBound(a) -

4、 1) i = i - 1 End If i = i + 1Loop While (i a(j) Then t = a(i): a(i) = a(j): a(j) = t End If Next j Print a(i); Next i Print a(n) End Sub Private Sub Command2_Click()n = n + 1ReDim Preserve a(n)m = InputBox(輸入一個正整數(shù))PrintPrint 插入; m; 后的數(shù)組為 If a(1) m Then For i = 2 To n - 2 If a(i) = m Then j = i: Exi

5、t ForNexta(j + 1) = mFor i = 1 To nPrint a(i);NextEnd IfIf m = a(10) Then a(n) = m For i = 1 To n Print a(i); Next End If End Sub 3數(shù)組a中存放著升序排列的數(shù)據(jù)，使用array賦值，將inputbox輸入的新數(shù)插入到數(shù)組中，插入后數(shù)組仍有序。注意：要求利用動態(tài)數(shù)組，能夠?qū)崿F(xiàn)多次插入Option ExplicitOption Base 1Dim a() As Integer, i As Integer, k As Integer, m As Integer, n As

6、 Integer, j As Integer, t As IntegerPrivate Sub Command1_Click()n = n + 1ReDim Preserve a(n)m = Val(InputBox(請輸入要插入的數(shù)據(jù))For i = 1 To n - 1If m a(j) Then t = a(i): a(i) = a(j): a(j) = t End If Next j Print a(i); Next i Print a(n) PrintEnd SubPrivate Sub Form_Load()Shown = 8ReDim a(n)a(1) = 5: a(2) = 1

7、0: a(3) = 15: a(4) = 20: a(5) = 30: a(6) = 90: a(7) = 108: a(8) = 1025For i = 1 To nPrint a(i);NextPrintEnd Sub46個評委為4位歌手打分，分?jǐn)?shù)介于1-100之間。去掉一個最高分，一個最低分，求出每位選手的最后得分。將4位歌手得分從高到低排列輸出，同時輸出該選手的編號。如： 歌手3 95分 歌手 1 87分 歌手 4 80分 歌手 2 70分Option ExplicitOption Base 1Private Type cj 自定義類型 na As String * 3fs As In

8、tegerEnd TypeDim a(4, 6) As SinglePrivate Sub Command1_Click()Dim i As Integer, j As IntegerFor i = 1 To 4 For j = 1 To 6 a(i, j) = InputBox(請第 & j & 位評委給第 & i & 位選手打分) NextNext End SubPrivate Sub Command2_Click()Dim i As Integer, j As Integer, b(4) As cjDim max As Single, sum As Single, min As Sing

9、le, ave As Single, t As cjFor i = 1 To 4 max = a(i, 1): sum = 0 min = a(i, 1): ave = 0 For j = 1 To 6 If a(i, j) max Then max = a(i, j) If a(i, j) min Then min = a(i, j) sum = sum + a(i, j) Next ave = (sum - max - min) / 4b(i).na = 歌手 & i: b(i).fs = aveNextFor i = 1 To 3 For j = i + 1 To 4 If b(i).f

10、s 0 Then X1 = (-1) * b + (b 2 - 4 * a * c) 0.5) / (2 * a) X2 = (-1) * b - (b 2 - 4 * a * c) 0.5) / (2 * a) getresult = x1= & CStr(X1) & Chr(9) & x2= & cstr(X2)Else X = (-1) * b / (2 * a) If b 2 = 4 * a * c Then getresult = x= & CStr(X) Else y = (4 * a * c - b 2) 0.5 getresult = x1= & CStr(X) & + & C

11、Str(y) & i & Chr(9) & x2= & CStr(X) & - & CStr(y) & i End IfEnd IfEnd Function6. 任意輸入一組字符，統(tǒng)計出大寫字母多少個，小寫字母多少個，數(shù)字多少個？要求用過程實現(xiàn)。Private Sub Command1_Click()Dim a As Integer, b As Integer, c As Integera = 0: b = 0: c = 0S = Len(Text1)For i = 1 To S If Mid(Text1, i, 1) 32 Then 沒空格 If Asc(a) Asc(Mid(Text1,

12、i, 1) And Asc(Mid(Text1, i, 1) Asc(z) Then a = a + 1 小寫字母 If Asc(A) Asc(Mid(Text1, i, 1) And Asc(Mid(Text1, i, 1) Asc(Z) Then b = b + 1 大寫的 If 48 Asc(Mid(Text1, i, 1) And Asc(Mid(Text1, i, 1) 57 Then c = c + 1 數(shù)字 End IfNext i Print 小寫字母共有 & a & 個 Print 大寫字母共有 & b & 個 Print 數(shù)字共有 & c & 個 Print 其它（包括空格

13、）共有 & S - a - b - c & 個 Print 字符個數(shù)： & SPrintEnd Sub7隨機(jī)產(chǎn)生一個5*5的矩陣，將主對角線和次對角線元素都置為1，并求出矩陣的四周元素之和，顯示在列表框中。Private Sub Form_Click()Dim i%, j%, s1%, s2%, s3%, s4%, s%Dim mat(1 To 5, 1 To 5) 定義矩陣For i = 1 To 5 For j = 1 To 5 If i = j Or i + j = 6 Then 主對角線和次對角線 mat(i, j) = 1 Else mat(i, j) = Int(Rnd * 8 +

14、 2) 其他位置產(chǎn)生隨機(jī)的大于2的一位數(shù) End If NextNextFor i = 1 To 5 For j = 1 To 5 Print mat(i, j); 一定不能忘記分號； Next PrintNext i 以下為求和For i = 1 To 5 s1 = s1 + mat(i, 1) 計算第一縱行的和 s2 = s2 + mat(i, 5) 計算第五縱行的和NextFor j = 1 To 5s3 = s3 + mat(1, j)s4 = s4 + mat(5, j)NextPrint s1, s2, s3, s4End Sub8編寫一個函數(shù)，能將字母按下列規(guī)律譯成密碼：AZ a

15、zBY by即第1個字母與第26個字母互換，第i個字母與第(26-i+1)個字母互換。在文本框中任意輸入一個字符串，調(diào)用該函數(shù)將密碼顯示在另一個文本框中。Option ExplicitDim str1 As String, str2 As String, a As String, ss As StringDim i As Integer, n As IntegerPrivate Sub Command1_Click()Text1.Text = : Text2.Text = End SubPrivate Sub Text1_Change()str1 = Text1.Textn = Len(str

16、1)For i = 1 To n a = Mid(str1, i, 1) 從字符串str1中的第i個字符開始向后截取1個字符 If Asc(a) = 97 And Asc(a) = 65 And Asc(a) = B, A, B)Y = IIf(A = B, A, B)Dor = X Mod YIf r = 0 Then Exit DoX = Y: Y = rLoopMaxg = YEnd FunctionRem 求最小公倍數(shù)Private Function Ming(A As Integer, B As Integer)Ming = A * B / Maxg(A, B) 使用函數(shù)套用End

17、Function10. 編寫計算階乘的Function過程，利用ex的下列公式計算e（直到最后一項小于10-6為止）的近似值。ex1 x/1! x2/2! x3/3! xn/n! Private Sub Form_Load()ShowDim x As Integer, n As Integer, s As Doublex = InputBox(請輸入一個數(shù)n：)n = 1: s = 1Do s = s + (x n) / (jc(n) 調(diào)用函數(shù)來計算階乘 n = n + 1 Loop Until x n / (jc(n) i Then a(i, j) = 0 Else If i = j The

18、n a(i, j) = 1 Else a(i, j) = a(i - 1, j) + a(i - 1, j - 1) 形成楊輝三角方式加和 End If End If If a(i, j) = 0 Then 如果ji，則退出這一行的書寫，開始寫下一行 Exit For Else Picture1.Print Tab(g); a(i, j); g = g + 10 End If Next j Picture1.Print 一行一行輸出Next iEnd SubPrivate Sub Picture1_Click()End Sub12編寫一個過程，輸出以下菱形圖形： A BBB CCCCC DDD

19、DDDD CCCCC BBB A主程序輸入一個奇數(shù)（3），調(diào)用過程在窗體上輸入圖形。Option ExplicitPrivate Sub Command1_Click()Dim n As Integer, a As Integern = InputBox(請輸入行數(shù)n)If n Mod 2 = 0 Or n 2 Then 如果輸入的不是奇數(shù)就報錯 a = MsgBox(請輸入奇數(shù))Else Call tp(n)End IfEnd SubPrivate Sub tp(x As Integer)Dim i As Integer, m As Integerm = 26 先將m放在中間位置，使圖像展開

20、For i = 1 To (x + 1) / 2 直到最多的那行 m = m - 1 每多一個字母，向前寫一位 Print Tab(m); String(2 * i - 1, Chr(64 + i) 確定每行寫幾個，后面的按字母順序輸出Next i String(N,S)是重復(fù)輸出N個S字符 大寫A是65 小寫a是97For i = (x + 1) / 2 + 1 To x 從最多的那行下一行開始寫 m = m + 1 Print Tab(m); String(2 * (x + 1 - i) - 1, Chr(64 + x + 1 - i)Next iEnd Sub13編寫一個將十進(jìn)制轉(zhuǎn)換為二

21、進(jìn)制字符串輸出的函數(shù)。調(diào)用函數(shù)計算用戶輸入一個十進(jìn)制數(shù)，在文本框中輸出二進(jìn)制值。注意：輸入數(shù)據(jù)為負(fù)數(shù)，應(yīng)該將符號位輸出如 -13 結(jié)果 -1101Dim n As IntegerPrivate Sub Form_Load()Dim x%n = InputBox(請輸入一個十進(jìn)制數(shù))If n = 1 ss = Str(r) & ss Str函數(shù)把數(shù)值轉(zhuǎn)換為字符型 m = m 2 注意此處為整除運(yùn)算符,一定不能寫為/ r = m Mod 2LoopIf n 0 Then Text1.Text = - & ss Else Text1.Text = ssEnd Function14輸入一個整數(shù)N，產(chǎn)生

22、N個隨機(jī)數(shù)（范圍110*N），然后采用任何2種算法實現(xiàn)由小到大的排序。將排序前后的數(shù)據(jù)顯示出來。Dim a() As Integer, n As IntegerPrivate Sub Form_Load()Shown = InputBox(請輸入正整數(shù)n)ReDim a(n)Print 排序前For i = 1 To n a(i) = Int(Rnd * (10 * n) + 1)Print a(i);Next iEnd SubPrivate Sub Command1_Click()Dim i As Integer, j As Integer, t As IntegerPrintPrint 用

23、比較交換法排序：For i = 1 To n - 1 For j = i + 1 To n If a(j) a(j + 1) Then t = a(j): a(j) = a(j + 1): a(j + 1) = t 依次從第一個開始同最后一個比較，把越大的放在越后面 End If Next 一輪比較從1到n-1Next 開始下一輪比較，從1到n-2For i = 1 To n Print a(i);NextEnd SubPrivate Sub Command3_Click()Dim i As Integer, j As Integer, t As IntegerPrintPrint 用選擇法排

24、序：For i = 1 To n - 1 k = i For j = i + 1 To n If a(k) a(j) Then k = j Next t = a(i): a(i) = a(k): a(k) = t Print a(i); NextPrint a(n)End Sub15 編寫程序，在窗體上輸出3100之間的所有素數(shù)。要求每行顯示4個數(shù)。Private Sub Command1_Click()Print 3-100之間的所有素數(shù)為Dim n As IntegerFor n = 3 To 100 If isprime(n) Then Call prtprime(n) 調(diào)用 函數(shù)和過程

25、Next nEnd SubFunction isprime(a As Integer) As BooleanDim i As Integerisprime = TrueFor i = 2 To Int(Sqr(a) 平方根 If a Mod i = 0 Then isprime = False Exit For End IfoNext iEnd FunctionSub prtprime(b As Integer)Static cnt As Integer 靜態(tài)變量cnt用來計數(shù)Print b;cnt = cnt + 1If cnt Mod 4 = 0 Then PrintEnd Sub16把文

26、本框1、文本框2指定的范圍內(nèi)的所有素數(shù)添加到列表框中，并選中列表框數(shù)據(jù)中最后一位是9的所有數(shù)據(jù)(設(shè)定selected屬性)，把它們的和值寫入到C:DATA.TXT中。Private Sub Command1_Click()Dim count, x, y, n, i As IntegerList1.Clearx = Val(Text1.Text): y = Val(Text2.Text)count = 0For n = x To y For i = 2 To n / 2 If n Mod i = 0 Then Exit For Next i If i n / 2 Then List1.AddItem nNextEnd SubPrivate Sub Command2_Click()Dim i As Integ