VB练习题四-六(6)

2019-03-11 12:43

第6章 过 程

Print \End Sub

Private Sub Form_Click()

x = 1 y = 1

Print \test

Print \End Sub

5)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Private Sub Form_Click()

test 3 End Sub

Private Sub test(x As Integer)

Dim i As Integer If x <> 0 Then

Call test(x - 1)

For i = 1 To x Print x; Next i Print End If End Sub

6)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Private Function f(a As Integer, b As Integer) As Integer

Dim i As Integer

Static m As Integer

i = 2: i = i + (m + 1): m = i + a + b f = m End Function

Private Sub form_click()

Dim k As Integer, m As Integer, p As Integer

k = 4: m = 1

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((第6章 过 程

p = f(k, m): Print p; p = f(k, m): Print p End Sub

(7)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Private Sub Form_Click()

Dim M As Integer, N As Integer

M = 1: N = 2

Print M + N + Fun1(M, N) M = 2: N = 1

Print Fun1(M, N) + Fun1(M, N) End Sub

Private Function Fun1(X As Integer, Y As Integer)

X = X + Y

Y = X + 3 Fun1 = X + Y End Function

(8)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Private Sub Form_Click()

Dim A As Integer, B As Integer, K As Integer A = 2: B = 4

K = Fun((A), B) + Fun(A, B)

Print K End Sub

Private Function Fun(N As Integer, M As Integer) As Integer

Static K As Integer N = N + M K = K + N M = M + K Fun = N + M Print Fun; N; M End Function

(9)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Dim A As Integer

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第6章 过 程

Private Sub Form_Click()

Dim B As Integer, D As Integer A = 1: B = 2

D = fun(A, fun(A, B)) Print A, B, D End Sub

Private Function fun(K As Integer, N As Integer) As Integer

Print K, N K = N + A + K N = K + A + N fun = K + N Print fun End Function

(10)阅读程序,写出程序运行后的输出结果:_____。

Option Explicit

Private Function Sub2(x As Integer, y As Integer, z As Integer)

Sub2 = 2 * x + y + 3 * z End Function

Private Function Sub1(x As Integer, y As Integer, z As Integer) Sub1 = Sub2(z, x, y) + x End Function

Private Sub Form_Click()

Dim a As Integer, b As Integer, c As Integer a = 2: b = 3: c = 4 Print Sub1(c, b, a) End Sub

4、编程题:

(1)输入一个四位正整数,将其逆序输出(如输入为1975,输出为5791)。 (2)验证任意一个大于5的奇数可表示为3个素数之和。

(3)编写一个将N进制数转换为十进制数的通用程序。

(4)已知竞赛小组12名学生竞赛成绩,请排列出他们的名次(成绩由键盘输入,成绩相同的名次相同)。

(5)编写用于判断输入的正整数是否为降序数的函数。设正整数n=d1d2d3…dk,如果满足di≥di+1(i=1,2,…,k-1),则n就是一个降序数。如4321和9433都是降序数。

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第6章 过 程

(6)求出2000以内的满足以下条件的正整数:该数本身不是素数,但它的所有因子之和是素数。提示:将素数的判断、因子之和的求解写成函数形式。

(7)编写一个求裴波拉契数列的递归过程,并将其前六项显示在文本框中。裴波拉契数列的通项公式如下:

?1,Fab(n)???Fab(n?2)?Fab(n?1),n?1,2n?3

(8)编写程序求下列数列的和,计算精确到第n项的值小于等于10-5为止。

y?12?12?4?12?4?6???12?4?6???2n??

(式中n=1, 2, 3, …)

(9)编写程序求下列级数的和,计算精确到第n项的值小于等于10-5为止。

S?x?x21?2?x32?3?x53?5???xfnfn?1??fn?? 0 < x < 1

其中:

?1,???1,?f?n?1?fn?2,n?1n?2 n?2fn(10)从键盘读取数组a和b的元素(各5个),a、b都是严格递增的(即元素从小到大排列,且无重复元素),将a、b合并成数组c,使c也严格递增。

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