VB實(shí)驗(yàn)任務(wù)答案

1、實(shí)驗(yàn)任務(wù)11課程名稱：程序設(shè)計(jì)基礎(chǔ)VB實(shí)驗(yàn)名稱實(shí)驗(yàn)十一 數(shù)組（1）一、實(shí)驗(yàn)?zāi)康模?掌握數(shù)組的聲明和數(shù)組元素的引用2掌握定長數(shù)組使用3掌握一維數(shù)組的基本操作算法二、實(shí)驗(yàn)內(nèi)容（包括實(shí)驗(yàn)要求(題目)、實(shí)驗(yàn)步驟、程序清單、運(yùn)行情況）：注意：其中每個(gè)同學(xué)實(shí)驗(yàn)1自行寫結(jié)果驗(yàn)證，實(shí)驗(yàn)2實(shí)驗(yàn)6發(fā)老師郵箱，盡量課上發(fā)。實(shí)驗(yàn)1 人工寫出如下程序的運(yùn)行結(jié)果，并利用單步調(diào)試工具驗(yàn)證執(zhí)行流程和運(yùn)行結(jié)果，進(jìn)一步深入弄清和理解數(shù)組的訪問。（1）在窗體上畫一個(gè)命令按鈕（其Name屬性為Command1），然后編寫如下代碼：Private Sub Command1_Click() Dim a(5) As Integer, i

2、As Integer, t As Integer For i = 0 To 4 a(i) = i + 1 t = i + 1 If t = 3 Then Print a(i); a(t - 1) = a(i - 2) Else a(t) = a(i) End If If i = 3 Then a(i + 1) = a(t - 4) : Exit For a(4) = 1 Print a(i); Next IEnd Sub運(yùn)行程序，單擊命令按鈕，輸出結(jié)果是 。（2）下面的事件過程執(zhí)行結(jié)束后，K的值是 ，A(2)的值是 ，A(7)的值是 ，程序中第二個(gè)循環(huán)被執(zhí)行了 次，程序中第三個(gè)循環(huán)被執(zhí)行了 次

3、。Option ExplicitOption Base 1 將數(shù)組的下界的默認(rèn)值設(shè)為1Private Sub Command1_Click() Dim A(10) As Integer, i As Integer, K As Integer For i = 1 To 10 A(i) = 1 Next i K = 1 For K = 1 To K Step K A(K) = 0 K = K + 2 Next K For K = K To 10 Step -1 A(K) = K K = K + 2 Next KEnd Sub（3）執(zhí)行下面程序，單擊命令按鈕Command1后，數(shù)組元素A(1, 2)

4、的值是 ，數(shù)組元素A(2, 2)的值是 ，數(shù)組元素A(3, 3)的值是 。Private Sub Command1_Click() Dim A(3, 3) As Integer, i As Integer, j As Integer, k As Integer Dim B i = 3: j = 1 A(i, j) = 1 For k = 2 To 9 If i + 1 > 3 Or j + 1 > 3 Then If j = 1 Then i = i - 1 ElseIf A(i - 1, j - 1) = 0 Then i = i - 1: j = j - 1 ElseIf j

5、= 3 Then i = i - 1 Else j = j + 1 End If ElseIf j = 1 Or i = 1 Then If A(i + 1, j + 1) = 0 Then i = i + 1: j = j + 1 Else j = j + 1 End If Else If A(i - 1, j - 1) = 0 Then i = i - 1: j = j - 1 End If End If A(i, j) = k Next k For Each B In A Print B Next End Sub實(shí)驗(yàn)2實(shí)驗(yàn)7-1 隨機(jī)生成12個(gè)二位正整數(shù)，分別賦值給一個(gè)3×4的

6、數(shù)組，找出每一行中的最大元素，運(yùn)行后界面如圖7-6所示。（參看例7-10）部分程序代碼如下請?zhí)羁铡ption ExplicitOption Base 1 將數(shù)組的下界的默認(rèn)值設(shè)為1Dim a(3, 4) As IntegerPrivate Sub Form_Click() Dim i As Integer, j As Integer, mmax As Integer Randomize Print "數(shù)組:" For i = 1 To 3 For j = 1 To 4 a(i, j) = Int(Rnd*(99-10+1)+10) Print a(I,j); Next j

7、 Print Next i Print "其中:" For i = 1 To 3 mmax = a(I,1) For j = 2 To 4 If mmax < a(i, j) Then mmax=a(I,j) Next j Print "第" + Str(i) + "行中的最大元素為:" mmax Next iEnd Sub實(shí)驗(yàn)3利用數(shù)組存放Fibonacci數(shù)列的前20項(xiàng)，并顯示輸出（每4個(gè)一行）。說明：Fibonacci數(shù)列的前兩項(xiàng)為1，從第三項(xiàng)開始，每項(xiàng)數(shù)據(jù)都等于前兩項(xiàng)數(shù)據(jù)之和，即數(shù)列為：1，1，2，3，5，8，13，&#

8、183; 圖 實(shí)驗(yàn)3運(yùn)行效果分析：像Fibonacci數(shù)列一般采用一維數(shù)組存放，根據(jù)題意可知數(shù)列中的每項(xiàng)數(shù)據(jù)是通過前兩項(xiàng)數(shù)據(jù)之和推導(dǎo)而出，因此可依據(jù)上述規(guī)律給數(shù)組賦值，完成數(shù)組的生成。注意：輸出采用標(biāo)準(zhǔn)格式，每4個(gè)一行。實(shí)驗(yàn)步驟：（1）填寫程序代碼，完成下列代碼：Option ExplicitPrivate Sub Form_Click() Dim i As Integer, Fibo(1 to 20) As Integer Fibo(1) = 1 Fibo(2)=1 For i = 3 To 20 Fibo(i)= Fibo(i-1)+Fibo(i-2) Next i Print "

9、;Fibonacci數(shù)列的前20項(xiàng)：" For i = 1 To 20 Print Fibo(i), If I mod 4=0 then print Next i PrintEnd Sub（2）調(diào)試程序，并保存文件。實(shí)驗(yàn)4 如圖所示由用戶輸入生成10個(gè)自然數(shù)，分別顯示其中的偶數(shù)、奇數(shù)以及它們的和。· 圖 按下“單擊輸入一組自然數(shù)”按鈕彈出輸入對話框· 圖 實(shí)驗(yàn)9-3 運(yùn)行結(jié)果分析：采用一維數(shù)組存放用戶輸入的10個(gè)數(shù)據(jù)，并結(jié)合累加求和算法完成。注意：數(shù)組聲明的位置；文本框中單行和多行顯示數(shù)據(jù)的方法實(shí)驗(yàn)步驟：（1）界面設(shè)計(jì)在窗體上按照圖所示界面排放好各個(gè)控件。（2）屬

10、性設(shè)置請根據(jù)程序代碼，設(shè)置好各個(gè)控件對象的名稱屬性；請根據(jù)圖設(shè)置多行文本框的MultiLine和ScrollBars屬性。（3）填寫程序代碼，完成下列代碼：Option ExplicitConst n = 10 Dim a(1 to n) As integer 定義數(shù)組Private Sub CmdCreate_Click() Dim i As Integer Text1 = "" For i = 1 To n a(i) = val(Inputbox(“請輸入第”, & I & “個(gè)數(shù)”,”project1”) Text1.Text = Text1.text

11、 & a(i) & ” ” Next iEnd SubPrivate Sub CmdDisp_Click() Dim I As Integer, odd As Integer, even As Integer Txteven = "" : Txtodd = "" even = 0 : odd = 0 For i=1 to n If a(i) mod 2=0 Then Txteven= Txteven & a(i) & vbcrlf even = even + a(i) Else Txtodd= Txtddd & a

12、(i) & vbcrlf Odd=odd+a(i) End If Next i Txteven = Txteven & "偶數(shù)和為" & even Txtodd = Txtodd & "奇數(shù)和為" & oddEnd Sub（4）調(diào)試程序，并保存文件。課外實(shí)驗(yàn)實(shí)驗(yàn)5 教材p177練習(xí)7Option Base 1Dim a(5, 5) As Integer, UpSum As Integer, DownSum As IntegerPrivate Sub CmdCal_Click() TxtUpDown = Abs(Up

13、Sum - DownSum)End SubPrivate Sub CmdCreate_Click() Dim i As Integer, j As Integer Picture1.Cls For i = 1 To 5 For j = 1 To 5 a(i, j) = Int(Rnd * 9 + 1) Picture1.Print a(i, j); Next j Picture1.Print Next iEnd SubPrivate Sub CmdDownSum_Click() Dim i As Integer, j As Integer DownSum = 0 For i = 1 To 5

14、For j = 1 To i - 1 DownSum = DownSum + a(i, j) Next j Next i TxtDownSum = DownSumEnd SubPrivate Sub CmdUpSum_Click() Dim i As Integer, j As Integer UpSum = 0 For i = 1 To 5 For j = i + 1 To 5 UpSum = UpSum + a(i, j) Next j Next i TxtUpSum = UpSumEnd Sub實(shí)驗(yàn)6 教材p177練習(xí)8Option Base 1Private Sub Form_Clic

15、k() Dim a() As Integer, i As Integer, j As Integer Dim col() As Integer, max As Integer, n As Integer n = InputBox("請輸入方陣的大小:") ReDim a(n, n), col(n) Print n & "階方陣:" For i = 1 To n For j = 1 To n a(i, j) = Int(Rnd * 101) - 50 '產(chǎn)生-50,50閉區(qū)間內(nèi)的隨機(jī)整數(shù) Print a(i, j), Next j Print Next i For j = 1 To n col(j) = 0 '累加器清零 For i = 1 To n col(j) = col(j) + Abs(a(i, j) '第j列元素絕對值求和 Next i Next j max = col(1): max