VB程序基础编程.docx

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1、VB程序基础编程 VB 期末考试编程题覆盖范围： 第一题要求（12 分）： 不用过程，覆盖以下算法： 1 求随机 10 个整数的最大值、最小值、平均值以及和； 2 求水仙花数； 3 一百零一元买一百零一鸡问题； 4 求 1010 以内的全部完数； 5 求各位数字之和; 6 求最小公倍数； 7 求逆序数； Private Sub Command3_Click() Dim s As String, i As Integer, j As Integer, n As Integer s = Text2.Text n = 0 For i = 1 To Len(s) - 1 For j = i + 1 T

2、o Len(s) If Mid(s, i, 1) > Mid(s, j, 1) Then n = n + 1 End If Next Next Print n End Sub 8 级数有限项求和问题； 9 求质因子问题； 10 字符统计。 Private Sub Command5_Click() Dim s As String, i As Integer, n As Integer, ch As String s = Text2.Text n = 0 For i = 1 To Len(s) ch = Mid(s, i, 1) If ch >= 0 And ch <= 9 Th

3、en n = n + 1 End If Next Print n End Sub 其次题要求（18 分）： 指定编写过程并调用此过程，覆盖以下算法: 1 判定素数过程； Function f 素数(ByVal n As Integer) As Boolean Dim i As Integer For i = 2 To n - 1 If n Mod i = 0 Then Exit Function Next f 素数 = True End Function 2 求最大公约数过程； Function f 最大公约数(ByVal x As Integer, ByVal y As Integer) A

4、s Integer Dim i As Integer For i = x To 1 Step -1 If x Mod i = 0 And y Mod i = 0 Then f 最大公约数 = i Exit Function End If Next End Function 3 冒泡排序过程； Sub s 冒泡法(x() As Integer) Dim i As Integer, j As Integer, c As Integer, n As Integer For i = UBound(x) - 1 To LBound(x) Step -1 n = 0 For j = LBound(x) T

5、o i If x(j) > x(j + 1) Then c = x(j) x(j) = x(j + 1) x(j + 1) = c n = n + 1 End If Next If n = 0 Then Exit Sub Next End Sub 4 依次查找过程； Function f 依次查找(x() As Integer, ByVal n As Integer) As Integer Dim i As Integer For i = LBound(x) To UBound(x) If x(i) = n Then f 依次查找 = i Exit Function End If Nex

6、t End Function 5 推断回文数过程； Function f 回文数(ByVal x As Long) As Boolean Dim s As String, ch As String, i As Integer, r As String s = CStr(x) r = For i = 1 To Len(s) ch = Mid(s, i, 1) r = ch r Next If r = s Then f 回文数 = True End Function 6 递归函数求阶乘； Function f 阶乘(ByVal n As Integer) As Double If n = 0 Or

7、 n = 1 Then f 阶乘 = 1 Else f 阶乘 = n * f 阶乘(n - 1) End If End Function 7 递归函数求 Fibonacci 数列； Function fib(ByVal n As Integer) As Long If n = 1 Or n = 2 Then fib = 1 Else fib = fib(n - 1) + fib(n - 2) End If End Function 8 矩阵靠边元素之和； 9 矩阵不靠边元素之和； Function f 靠边元素之和(x() As Integer) As Long Dim i As Intege

8、r, j As Integer For i = LBound(x, 1) To UBound(x, 1) For j = LBound(x, 2) To UBound(x, 2) If i = LBound(x, 1) Or i = UBound(x, 2) Or j = LBound(x, 2) Or j = UBound(x, 2) Then f 靠边元素之和 = f 靠边元素之和 + x(i, j) End If Next Next End Function Function f 不靠边元素之和(x() As Integer) As Long Dim i As Integer, j As

9、 Integer For i = LBound(x, 1) To UBound(x, 1) For j = LBound(x, 2) To UBound(x, 2) If Not (i = LBound(x, 1) Or i = UBound(x, 2) Or j = LBound(x, 2) Or j = UBound(x, 2) Then f 不靠边元素之和 = f 不靠边元素之和 + x(i, j) End If Next Next End Function 10 矩阵转置。 Sub s 转置(x() As Integer, y() As Integer) Dim i As Integer, j As Integer For i = LBound(y, 1) To UBound(y, 1) For j = LBound(y, 2) To UBound(y, 2) y(i, j) = x(j, i) Next Next End Sub 其它题型： 单选题 40 题，每题 1 分共 50 分，填空题 10 空，每空 1 分，共 20 分。 第5页 共5页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页第 5 页 共 5 页