[原创]手把手教VB之数据结构篇（一）

[snowcloud2002]

线性表结点的插入和删除算法

'作者:Snowcloud
'插入结点
'函数名称: NodeInsert(Pos As Integer, Num As Integer, TableName As Variant, Cnt As Integer) As Boolean
'参数: Pos As Integer要插入结点的位置,Num As Integer要插入的数值,TableName As Variant线性表名称,Cnt As Integer线性表长度
'返回值: Boolean

Function NodeInsert(Pos As Integer, Num As Integer, TableName As Variant, Cnt As Integer) As Boolean
'改变源线性表长度：插入结点后线性表长度加一
ReDim Preserve TableName(UBound(TableName) + 1)
'对线性表中第i个元素到最后一个元素的位置后移一位
For i = (UBound(TableName)) To (Pos + 1) Step -1
If i < 1 Or i > (UBound(TableName)) Then
Insert = False
Exit Function
Else
TableName(i) = TableName(i - 1)
End If
Next
'将要插入的元素放到第i个位置
TableName(i) = Num
'记录改变后的线性表长度
Cnt = UBound(TableName) + 1
Insert = True
End Function

'删除结点
'函数名称: NodeDelete(Pos As Integer, TableName As Variant, Cnt As Integer) As Boolean
'参数: Pos As Integer要删除结点的位置,TableName as Variant线性表名称,Cnt As Integer线性表长度
'返回值: Boolean
Function NodeDelete(Pos As Integer, TableName As Variant, Cnt As Integer) As Boolean
'对线性表中第i个元素到最后一个元素的位置前移一位
For i = Pos To (UBound(TableName))
If i < 1 Or i > (UBound(TableName)) Then
Delete = False
Exit Function
Else
TableName(i - 1) = TableName(i)
End If
Next
'改变源线性表长度:删除结点后线性表长度减一
ReDim Preserve TableName(UBound(TableName) - 1)
'记录改变后的线性表长度
Cnt = UBound(TableName) - 1
Delete = True
End Function

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欢迎大家发表看法，有问题的地方大家请指正，谢谢！
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[zyl910]

up

[zjcxc]

学习

[boywang]

node比较多的情况下,楼主的办法不是太慢了点吗?

[James0001]

可以，就是效率好像低了点儿。
不错

[snowcloud2002]

对，在顺序存储结构的线性表中插入和删除一个数据元素，平均所需移动表中一半的元素，若表长为n则Insert,Delete的时间复杂性为O(n),所以当n很大的话，效率是十分低的。

在此只是抛砖引玉，希望大家能够学习一下数据结构，并自行的写一些算法例子，这样有助于提高。

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谢谢大家支持啊！
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