数据结构学习(4):栈
栈:
using System;
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namespace DataStructure.Stack
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
class StackNode
{
Object item;
StackNode link;
}
class Stack
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main(string[] args)
{
//
// TODO: 在此处添加代码以启动应用程序
//
}
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class Stack
{
private StackNode topNode;
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public boolean empty()
{
return (topNode==null);
}
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public void push(Object X)
{
StackNode newNode=new StackNode();
newNode.item=X;
newNode.link=topNode;
topNode=newNode;
}
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public Object pop()
{
if(topNode==null)
{
return null;
}
else
{
StackNode tempNode=topNode;
topNode=topNode.link;
return tempNode.item;
}
}
public Object peek()
{
if(topNode==null)
{
return null;
}
else
{
return topNode.item;
}
}
}
}
}
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