请回答下列问题:
(1) 若要清空窗体的标题内容“ Form1 ”,能实现该功能的语句是______(单选,填字母:
A.Form1.Caption=“”/B. Form1.Text =“ ”/C. Form1.Clear)
(2)实现上述功能的 VB 程序如下,请在划线处填入合适的代码。
_______________
_______________
_______________
(3)程序中加框处代码有错,请改正。
改正:_______________
Private Sub Command1_Click()
Dim n As Integer,st As Integer,now As Integer,ans As String,i As Integer Dim key(20) As Integer,nxt(20) As Integer
n = Val(Text1.Text) '从文本框中读入数列到 key 数组的代码略
st=1
①
Do While i <= n
If key(st) > key(i) Then
nxt(i) =st
st=i
Else
now = st:flag =1
Do While nxt(now) <> 0
If key(nxt(now)) > key(i) Then
nxt(now) = i
flag = 0
Exit Do
End If
②
Loop
If flag = 1 Then
nxt(now) = i
End If
End If
i=i+1
Loop
now = st
Do While nxt(now) <> 0
ans = ans +Str(key(now))+"->" now = nxt(now)
Loop
Text3.Text = ③
End Sub
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2