i=2
Do While i<=6
For j=6 To i+2 Step -2
If a(j)>a(j-2)Then t=a(j):a(j)=a(j-2):a(j-2)=t
Next j
i=i+2
Loop
则程序运行之后,数组元素a(1)和a(2)的值分别是( )
Function calculate(x As Integer, y As Integer, op As String) As Integer
If op = "+" Then calculate = x + y
If op = "-" Then calculate = x - y
If op = "*" Then calculate = x * y
If op = "\" Then calculate = x \ y
End Function
Function state(op As String) As Integer
If op = "#" Then state = -1
If op = "=" Then state = 1
If op = "+" Then state = 1
If op = "-" Then state = 1
If op = "*" Then state = 3
End Function
Private Sub Command1_Click()
Dim s As String, length As Integer, t As String Dim k As Integer, q As Integer
Dim opt(0 To 3) As String Dim i As Integer
Dim s1 As String
Dim a(1 To 3) As Integer
s = Text1.Text
length = Len(s)
t = "": k = 0: q = 0: opt(q) = "#"
For i = 1 To length
s1 = Mid(s, i, 1)
If s1 >= "0" And s1 <= "9" Then
t = t + s1
Else
k = k + 1
a(k) = Val(t)
t = ""
Do While
a(k - 1) = calculate(a(k - 1), a(k), opt(q))
k = k - 1
q= q - 1
Loop
q = q + 1
If s1 = "=" Then Label1.Caption = Str(a(1))
End If
Next i
End Sub
Private Sub Comand1_Click( )
Dim s As String, c As String
Dim t As Integer, I As Integer
Dim a(1 To 26)As Integer
s=Text1.Text
For i=1 to 26
a(i)=0
Next i
i=1
Do While i<=Len(s)
c=Mid(s, i, 1)
If ① Then
t=Asc(c)-96
Else
t=Asc(c)-64
End If
If a(t)=0 Then
a(t)=1
Else
②
End If
i=i+1
Loop
Label1.Caption=s
End Sub
① ②
s="R255:G122:B221:End"
c=1
For i=1 To Len(s)
t=Mid(s,i,1)
If t>="0" And t<="9" Then
a(c)=t+a(c)
Else
c=c+1
End If
Next i
已知数组a各元素的初始值均为空字符串,执行该程序段后,字符串122存储在数组( )中。
Dim a(1 To 5) As Integer
Dim i As Integer
Dim j As Integer
Dim s As String
s = ""
For i = 2 To 5
For j = i To 5
If j Mod i = 0 Then a(j) =a(j)+1
Next j
Next i
For i = 1 To 5
If a(i) <> 1 Then s = Str(i) + s
Next i
Text1.Text = s
若数组a的初始值都为0,则运行该程序段后,Text1中显示的内容为( )
import random
n=int(input("请输入随机数个数n:"))
d=[]
for i in range(n):
d.append(random.randint(1,100))
print(d)
key=int(input("请输入需要查找的数:"))
for i in range(len(d)):
if key==d[i]:
print("查找成功!索引号为:",i)
break
Dim a(1 To 6) As Integer
Sum =0
For i= 1 To 6
For j = i+1 To 6
If j Mod i =0 Then a(j)=1 – a(j)
Next j
Next i
For i=1 To 6
Sum Sum+ Str(a(i))
Next i
Text1. Text = Str(Sum)
该程序段运行后,文本框Text1中显示的内容是( )
def isprime (x):
for i in range(2, x):
if x % i= 0:
return False
return True
prime = []
for i in range(2, 21):
if isprime(i):
prime.append(i) #将 i添加到列表
print (len(prime))
运行该程序段,输出结果是
点击“查找”按钮,查找所有符合要求的正方形。算法思路:枚举正方形对角线上的线段端点A、C(即保证线段AC与x轴呈斜45度的夹角),通过A、C点,计算出正方形另-条对角线上的线段端点B、D,再查找B、D是否存在,若存在,则说明该正方形可以生成。
Dim n As Integer, x(1000) As Integer, y(1000) As Integer
Private Sub Command2_Click( )
'生成n个点的坐标,并按要求排序,代码略
'第i个点的坐标保存在x(i)和y(i)并显示在List1 中
End Sub
Private Sub Command2_Click()
Dim i As Integer, j As Integer
For i=1 To n
For j=i+1 To n
If Then
If search(x(i), y(j)) = True And search() = True Then
'将4个坐标点显示在List2中,代码略
cnt=cnt+1
End If
End If
Next j
Next i
List2AddItem "总共有" + Str(cnt) + "个符合要求的正方形"
End Sub
Function search(x As Integer, sy As Integer) As Boolean
Dim L As Integer, R As Integer, m As Integer
search = False: L= 1: R= n
Do While L<= R
m=(L+R)\2
If sx < x(m) Or Then
R=m-1
ElseIf x> x(m) Or x= x(m) And ey > y(m) Then
L=m+1
Else
search = True: Exit Do
End If
Loop
End Function
.....
Next
B . For i=0 To ListCount-1.....
Next
C . For i=1 To List1.listCount.....
Next
D . For i=1 To ListCount.....
Next
X=“ABCDEFG”
For i =4 to 1 setp -1
y=y+mid(x, i, 1)
Next i
s=0
for i in range():
print(s)
for num in range(2,10):
if num % 2==0 :
continue
print(num,end=”、”)
c = Text1.Text
s1 = "jiayou!" s2 = s1 + s1
For i =1 to len(s1)
If c = Mid(s2, i, Len(s1)) Then Exit For
Next i
Label1.Caption = Str(i)
程序执行完后,Label1中显示的内容是4,则Text1中输入的内容是( )
n = 4
For i = 1 To 25
j = 1: a(j) = a(j) + 1
Do While a(j) = 4
a(j) = 0
j = j + 1
a(j) = a(j) + 1
Loop
Next i
For i = 1 To n
s = Str(a((i + 1) Mod 4 + 1)) + s
Next i
数组a(1)至a(4)初值均是0,执行该程序后,s的值是( )
s=1
for i in_______:
s+=i
for i in range(5, 1):
print(i,end=" ")
①请填空完善该程序,实现功能:计算表达式s=1-2+3-4……+99=100的值并输出结果;
②编写完成后原名保存并关闭应用软件。
s=0
for i in range(1,):
if :
s=s-i
else:
print()
j = 1: p = 5
Do While p > 0
j = (j + k -2) Mod p + 1
s1 = s1 &j
s = Mid(s, 1, j -1) + Mid(s, j + 1)
p = p -1
Loop
已知s1的初值为""(空),下列选项关于s1的最终结果错误的是( )