2018年9月计算机二级VB考试强化练习试题(5)

 1.以下程序段：

Private Sub Form_Load( )

Dim Nop As Integer, Op As String * 1

Num1 = 3

Num2 = 2

Nop = val(Inputbox("请输入1-4之间的整数"))

Select Case Nop

Case 1

Op = "+"

Result = Num1 + Num2

Case 2

Op = "-"

Result = Num1 - Num2

Case 3

Op = "×"

Result = Num1 * Num2

Case 4

Op = "÷"

Result = Num1 / Num2

End Select

Label1= Num1 & Op & Num2 & "=" & Result

End Sub

窗体运行后，输入2，则label1的标题显示结果为(B)(单)

A.3+2=5

B.3-2=1

C.3×2=6

D.3÷2=1.5

2.以下程序段：

Private Sub Form_Load( )

Dim Nop As Integer, Op As String * 1

Num1 = 3

Num2 = 2

Nop = val(Inputbox("请输入1-4之间的整数"))

Select Case Nop

Case 1

Op = "+"

Result = Num1 + Num2

Case 2

Op = "-"

Result = Num1 - Num2

Case 3

Op = "×"

Result = Num1 * Num2

Case 4

Op = "÷"

Result = Num1 / Num2

End Select

Label1= Num1 & Op & Num2 & "=" & Result

End Sub

窗体运行后，输入3，则label1的标题显示结果为(C)(单)

A.3+2=5

B.3-2=1

C.3×2=6

D.3÷2=1.5

3.以下程序段：

Private Sub Form_Load( )

Dim Nop As Integer, Op As String * 1

Num1 = 3

Num2 = 2

Nop = val(Inputbox("请输入1-4之间的整数"))

Select Case Nop

Case 1

Op = "+"

Result = Num1 + Num2

Case 2

Op = "-"

Result = Num1 - Num2

Case 3

Op = "×"

Result = Num1 * Num2

Case 4

Op = "÷"

Result = Num1 / Num2

End Select

Label1= Num1 & Op & Num2 & "=" & Result

End Sub

窗体运行后，输入4，则label1的标题显示结果为(D)(单)

A.3+2=5

B.3-2=1

C.3×2=6

D.3÷2=1.5

4.以下程序段的作用是(A)(单)

Private Sub Picture1_Click( )

Dim asci As Integer, i As Integer

i = 0

For asci = 32 To 126

Picture1.Print Tab(7 * i + 2); Chr(asci); "="; asci;

i = i + 1

If i = 7 Then i = 0: Picture1.Print

Next asci

A.打印ASCII码表，一行7个表达式

B.打印九九乘法表，一行7个表达式

C.打印ASCII码表，一行8个表达式

D.以上说法都不正确

5.我国现在人口有13亿，按人口增长0.8%计算，多少年后我国人口将超过26亿。

Private Sub Command1_Click( )

Dim x, n

x = Val(Text1)

n = 0

Do While 【x】<26

x = x * (1 + 0.008)

n = n + 1

Loop

Text2 = Str(n)

End Sub

6.以下程序的作用是(B)(单)

For i = 1 To 9

For j = 1 To 9

se = i & "×" & j & "=" & i * j

Picture1.Print Tab((j - 1) * 9 + 1); se;

Next j

Picture1.Print

Next i

A.打印ASCII码表

B.打印九九乘法表

C.打印加法表

D.以上说法都不正确

7.求自然数e的近似值，误差小于0.00001，近似公式为：e=1+1/1!+1/2!+1/3!+……+1/I!+……以下程序用来求自然数e。

Private Sub Form_Click( )

Dim I%, n&, t!, e!

E = 0 ' 存放累加和结果

I = 0 ' 计数器

n = 1 ' 存放阶乘的值

t = 1 ' 级数第I项值

Do While 【t>】 0.00001

e = e + t

I = I + 1

n = n * I

t = 1 / n

Loop

Print "计算了 "; I; " 项的和是 "; e

End Sub

8.求自然数e的近似值，误差小于0.00001，近似公式为：e=1+1/1!+1/2!+1/3!+……+1/I!+……以下程序用来求自然数e。

Private Sub Form_Click( )

Dim I%, n&, t!, e!

E = 0 ' 存放累加和结果

I = 0 ' 计数器

n = 1 ' 存放阶乘的值

t = 1 ' 级数第I项值

Do While t>0.00001

e = e + 【t】

I = I + 1

n = n * I

t = 1 / n

Loop

Print "计算了 "; I; " 项的和是 "; e

End Sub

9.求自然数e的近似值，误差小于0.00001，近似公式为：e=1+1/1!+1/2!+1/3!+……+1/I!+……以下程序用来求自然数e。

Private Sub Form_Click( )

Dim I%, n&, t!, e!

E = 0 ' 存放累加和结果

I = 0 ' 计数器

n = 1 ' 存放阶乘的值

t = 1 ' 级数第I项值

Do While t>0.00001

e = e + t

I = I + 1

n = n * 【I】

t = 1 / n

Loop

Print "计算了 "; I; "项的和是"; e

End Sub

10.以下程序是求最大公约数和最小公倍数的程序。

Private Sub Form_Click( )

Dim m1, n1, m, n, r As Integer

n1 = InputBox("输入自然数n", "输入数")

m1 = InputBox("输入自然数m", "输入数")

n = n1

m = m1

If m < n Then

t = m: m = n: n = t

End If

r = m Mod 【n】

Do While (r<>0)

m = n

n = r

r = m Mod n

Loop

Print "最大公约数=", n

Print "最小公倍数= ", m1 * n1 / n

End Sub