Next j
If i<>k Then
t=a(i):a(i)=a(k):a(k)=t
End If
Next i
修改程序中画线语句后,可实现数组中的数降序
排序的是()
A.将③处语句修改为a(j)>a(k)
B.将②处语句修改为i﹣1 To 1 Step﹣1
C.将②处语句修改为6﹣i To i
D.将①处语句修改为1 To 5
4.有如下VB程序段:
Dim a(1To 5)As String
a(1)=“400“:a(2)=“33“:a(3)=“44“a(4)=“300“:a(5)=“8“
For i=1To 3
Forj=5To i+1Step﹣1
If a(j)>a(i) Then
t=a(j):a(j)=a(i):a(i)=t End If
Next j
Next i
该程序段运行后,数组元素a(1)到a(5)的依次为()
A.400 300 44 33 8
B.8 44 400 33 300
C.33 300 400 44 8
D.8 44 400 300 33
5.某VB程序段如下:
i=1
Do While i<=3
min=i
j=i+1
Do While j<=6
If a(j)<a(min)Then min=j j=j+1
Loop
If i<>min Then
tmp=a(i)
a(i)=a(min)
a(min)=tmp
End If
i=i+1
Loop
数据元素a(1)到a(6)的值依次为“7,8,3,9,6,2”,则该程序段运行后,数组元素a(1)到a(6)的数据依次是()
A.9,8,7,3,6,2
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B.2,3,6,7,8,9
C.2,3,6,9,8,7
D.9,8,7,6,3,2
6.某排序算法的VB程序段如下:
For i=0To 9
Max=a(i)
For j=i To 9
If a(j)>Max Then
Max=a(j)
t=a(i):a(i)=a(j):a(j)=t End If
Next j
Next i
数组元素a(0)到a(9)的值依次为“25,64,15,40,74,80,27,65,84,53”.若该程序执行外层循环1次后得到的结果是()A.84 80 74 65 64 53 40 27 25 15
B.85 25 15 40 64 74 27 65 80 53
C.64 25 15 40 74 80 27 65 84 53
D.74 25 15 40 64 80 27 65 84 53
7.有如下程序段:
Count=0
For i=1 To 4
For j=5 To i+1 Stop﹣1
If a(j)>a (i) Then
Count=Count+1
t=a(j):a(i)=a(i):a(i)=t
End If
Next j
Next i
数组元素a(1)到a(5)的值依次为“63,14,12,26,81”,经过该程序段“加工”后,变量count 的值为()
A.2 B.3 C.4 D.5
8.某同学用VB编制了一段程序,想实随机产生10个10﹣100之间的整数,然后在列表框List1中按照从小到大的顺序输出.但是该同学在关键处出现问题,你能否帮他把程序补充完整.请在程序段划线处①②③④填上合适的语句.
Private Sub Command1_Click
Dim a(10)As Integer
Randomize
For i=1To 10
a(i)= _①__
Next i
For i=1To 9
For _②__ To 10
If a(i)>a(j) Then
r=a(i)
__③___
a(j)=r
End If
Next j
Next i
For i=1To 10
____④____
Next i
End Sub.
1.D
2.B
3.B
4.A
5.C
6.B
7.C 8①int(rnd*91)+10 ②j=j+1
③a(i)=a(j) ④List1.AddItemStr(a(i))
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