- 基础理论
- 数据及数据库技术
- 人工智能
- 算法理论
- 程序设计语言
- 循环结构
- 分支结构
- 顺序结构
- 类、对象、属性、方法、事件和事件处理的概念
- VB应用程序的界面设计与调试
- 基本数据类型
- 常量、变量、数组
- 常用的标准函数
- 基本运算及表达式
- 赋值语句
- + 选择语句
- 循环语句
- 多媒体理论
- 基础软件操作
- 算法软件操作
- 多媒体软件操作
- 网络技术应用
Sub test3()双重循环运行 输出图形 与3重复,但3已改题
For i =" 1" To___1___step 1
s = ""
For j =" 1" To 2 * i - 1
s =" Str(j)" + s
Next j
List1.AddItem s
Next i
End Sub
该程序的运行后列表框输出的第三行是 （ ）
For i =" 1" To___1___step 1
s = ""
For j =" 1" To 2 * i - 1
s =" Str(j)" + s
Next j
List1.AddItem s
Next i
End Sub
该程序的运行后列表框输出的第三行是 （ ）
| A．33333 | B．55555 | C．12345 | D．54321 |
对数组声明语句：Dim a(0 to 3,0 to 4) As Integer，下面说法不正确的是( )
| A．a(1,2)=50000,执行后系统会提示“溢出”错误 |
| B．a数组共有12个下标变量 |
| C．a(1,2)是a数组中的元素 |
| D．若j="1," a(1,0)=3则a(j-1,a(1,0))就是a(0,3) |
有如下visual basic程序：
private Sub command1_Click()
s=0
If s<="99" then
For j="1to" 10
s=s+j
Next j
Else
print “程序出错！”
Endif
print “最后的s的值是:”；s
End Sub
请问以上程序的控制结构包含了（ ）
private Sub command1_Click()
s=0
If s<="99" then
For j="1to" 10
s=s+j
Next j
Else
print “程序出错！”
Endif
print “最后的s的值是:”；s
End Sub
请问以上程序的控制结构包含了（ ）
| A．顺序结构、树型结构 |
| B．顺序、选择结构 |
| C．顺序、选择和循环结构 |
| D．顺序、循环结构 |
有以下程序段：
s = 1:j=2
Do While s<j
For j =" 2" To -2 Step -1
s = s*j
Next j
Loop
MsgBox(s)
则s =" s*j" 的执行次数是( )
s = 1:j=2
Do While s<j
For j =" 2" To -2 Step -1
s = s*j
Next j
Loop
MsgBox(s)
则s =" s*j" 的执行次数是( )
| A．1 | B．4 | C．5 | D．6 |
Sub test7()
For i =" 1" To 6
S =" S" + (-1) ^ i *2 ^ i
Next i
MsgBox (S)
End sub
该程序的运行结果是（ ）
For i =" 1" To 6
S =" S" + (-1) ^ i *2 ^ i
Next i
MsgBox (S)
End sub
该程序的运行结果是（ ）
| A．126 | B．-126 | C．-42 | D．42 |
Function f(x As Long, y As Long) As Long
Dim t As Long, r As Long
If x < y Then t =" x:" x =" y:" y = t
r =" x" Mod y
Do While r <> 0
x =" y:" y = r
r =" x" Mod y
Loop
f = y
End Function
-------------------------------------------------------------------------------------------------
Private Sub Command1_Click()
Dim a As Long, b As Long
x = Val(InputBox("x="))
y = Val(InputBox("y="))
a =" x:" b = y
s =" f(x," y)
MsgBox (Str(a * b / s))
End Sub
当x=20，y=6时，以上程序运行后，输出结果是（ ）
Dim t As Long, r As Long
If x < y Then t =" x:" x =" y:" y = t
r =" x" Mod y
Do While r <> 0
x =" y:" y = r
r =" x" Mod y
Loop
f = y
End Function
-------------------------------------------------------------------------------------------------
Private Sub Command1_Click()
Dim a As Long, b As Long
x = Val(InputBox("x="))
y = Val(InputBox("y="))
a =" x:" b = y
s =" f(x," y)
MsgBox (Str(a * b / s))
End Sub
当x=20，y=6时，以上程序运行后，输出结果是（ ）
| A．2 | B．120 | C．30 | D．60 |
有关下列语句说法不正确的是（ ）
① If a="b=c" Then Msgbox(“这三个数相等”) Else Msgbox(“这三个数不相等”)
②赋值语句 a=b>c
③赋值语句 a+b=c
④ Msgbox (a+b=c)
① If a="b=c" Then Msgbox(“这三个数相等”) Else Msgbox(“这三个数不相等”)
②赋值语句 a=b>c
③赋值语句 a+b=c
④ Msgbox (a+b=c)
| A．语句①能运行，但逻辑上有错误 |
| B．语句②能运行，且无任何逻辑错误 |
| C．语句③不能运行 |
| D．语句④不能运行 |
在窗体上画一个名称为Command1的命令按钮，然后编写如下事件过程：
Private Sub Command1_Click()
Dim n As Integer
Dim m As Integer
m = 0
For n =" 1" To 20
If n Mod 3 <> 0 Then m =" m" + n \ 3
Next n
Text1.text = Str(m)
End Sub
程序运行后，如果单击命令按钮，则文本框Text1中显示的内容是 ( )
Private Sub Command1_Click()
Dim n As Integer
Dim m As Integer
m = 0
For n =" 1" To 20
If n Mod 3 <> 0 Then m =" m" + n \ 3
Next n
Text1.text = Str(m)
End Sub
程序运行后，如果单击命令按钮，则文本框Text1中显示的内容是 ( )
| A．15 | B．18 | C．42 | D．24 |
在信息加工中，经常要对被处理的数据进行排序，在排序时经常要进行数据的交换。下面有四个程序段：
其中将能正确地x和y两个变量中的数据进行交换的程序段有几个？
其中将能正确地x和y两个变量中的数据进行交换的程序段有几个？
| A．1个 | B．2个 | C．3个 | D．4个 |
【加试题】小王模拟超市收银机扫描商品条形码后计算总价的过程制作了一个VB程序。功能如下：在文本框Text1中输入商品条形码，按回车键后会将已经输入的条形码显示在列表框List1中，同时将商品明细显示在列表框List2中。点击按钮“计算商品总价”后，会将所有商品的总价显示在文本框Text2中。程序界面如图所示：
实现上述功能的部分VB程序如下，请在三个划线处填入合适代码。
'定义全局数组变量
Dim a(1 To 10) As Long
Dim b(1 To 10) As String
'自动加载条形码信息以及对应的商品信息
Private Sub Form_Load()
Dim i As Integer
a(1) = 503741
For i =" 2" To 10
a(i) =" a(i" - 1) + 1
Next i
b(1) = "可乐 5.00"
b(2) = "薯片 7.50"
b(3) = "牛奶 5.60"
b(4) = "橙汁 7.50"
b(5) = "面包 4.00"
b(6) = "蜂蜜 28.00"
b(7) = "蛋糕 12.00"
b(8) = "绿箭 3.50"
b(9) = "饼干 6.00"
b(10) = "雪碧 5.00"
End Sub
'输入条形码，查找条形码，并显示条形码及其对应的商品信息
Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim txm As Long:
Dim i As Integer:
Dim j As Integer
txm = Val(Text1.Text)
If KeyAscii =" 13" Then
If txm >=" 503741" And txm <=" 503750" Then
List1.AddItem txm
Text1.Text = ""
i =" 1:" j = 10
Do While i <= j
①
If txm =" a(m)" Then
List2.AddItem b(m)
Exit Do
ElseIf txm > a(m) Then
i =" m" + 1
Else
②
End If
Loop
Else
MsgBox "条形码输入错误，无此商品"
Text1.Text = ""
End If
End If
End Sub
'计算所购商品的总额
Private Sub Command1_Click()
Dim i As Integer, mx As String, jg As String, sum As Single
For i =" 0" To 9
If List2.List(i) <> "" Then
mx = List2.List(i)
sum =" sum" + Mid(mx, 4)
End If
Next i
Text2.Text = ③
End Sub
实现上述功能的部分VB程序如下，请在三个划线处填入合适代码。
'定义全局数组变量
Dim a(1 To 10) As Long
Dim b(1 To 10) As String
'自动加载条形码信息以及对应的商品信息
Private Sub Form_Load()
Dim i As Integer
a(1) = 503741
For i =" 2" To 10
a(i) =" a(i" - 1) + 1
Next i
b(1) = "可乐 5.00"
b(2) = "薯片 7.50"
b(3) = "牛奶 5.60"
b(4) = "橙汁 7.50"
b(5) = "面包 4.00"
b(6) = "蜂蜜 28.00"
b(7) = "蛋糕 12.00"
b(8) = "绿箭 3.50"
b(9) = "饼干 6.00"
b(10) = "雪碧 5.00"
End Sub
'输入条形码，查找条形码，并显示条形码及其对应的商品信息
Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim txm As Long:
Dim i As Integer:
Dim j As Integer
txm = Val(Text1.Text)
If KeyAscii =" 13" Then
If txm >=" 503741" And txm <=" 503750" Then
List1.AddItem txm
Text1.Text = ""
i =" 1:" j = 10
Do While i <= j
①
If txm =" a(m)" Then
List2.AddItem b(m)
Exit Do
ElseIf txm > a(m) Then
i =" m" + 1
Else
②
End If
Loop
Else
MsgBox "条形码输入错误，无此商品"
Text1.Text = ""
End If
End If
End Sub
'计算所购商品的总额
Private Sub Command1_Click()
Dim i As Integer, mx As String, jg As String, sum As Single
For i =" 0" To 9
If List2.List(i) <> "" Then
mx = List2.List(i)
sum =" sum" + Mid(mx, 4)
End If
Next i
Text2.Text = ③
End Sub