【数据结构】队列和栈

队列节点

QueueNode.h
#pragma once
#include <iostream>
using namespace std;
template <class T>class QueueNode
{
public:
	T data;
	QueueNode<T>* next;
	QueueNode():next(NULL){};
	QueueNode(T val):data(val),next(NULL){}
};

链式队列

QueueList.h
#include "QueueNode.h"
#include <assert.h>
//no head node
//when insert the first node ,you need let the front node point it.
template <class T>class QueueList
{
public:
	QueueNode<T> *front;
	QueueNode<T> *rear;

	QueueList():front(NULL),rear(NULL){};
	
	bool IsEmpty()
	{
		return front==NULL;
	}
	void EnQueue(T val)
	{
		QueueNode<T>* add=new QueueNode<T>(val);
		if (IsEmpty())//when insert the first node ,you need let the front node point it.
		{
			front=rear=add;
		}
		else
		{
			rear->next=add;//when the head node exits,you just need change rear point.
 			rear=add;
		}
	}
	T DeQueue()
	{
		assert(!IsEmpty());
		QueueNode<T> *del=front;
		T val=del->data;
		front=front->next;
		if (del==rear)
		{
			rear=NULL;
		}
		delete del;
		return val;
	}
	void SetNull()
	{
		while (!IsEmpty())
		{
			DeQueue();
		}
	}
	void Traverse()
	{
		QueueNode<T>* p=front;
		while (p)
		{
			cout<<p->data<<" ";
			p=p->next;
		}
	}
	int GetFront()
	{
		if (IsEmpty())
			return 0;
		return front->data;
	}
};

循环队列

Queue.h
#include <assert.h>
#define MAX_SIZE 10
template<class T>class Queue
{
	int rear;
	int front;
	T * data;
public:
	Queue():front(0),rear(0)
	{
		data= new T[MAX_SIZE]; 
	}
	
	//判空
	bool IsEmpty()
	{
		return rear==front;
	}
	//判断满
	bool IsFull()
	{
		return (rear+1)%MAX_SIZE==front;
	}
	//入队
	bool EnQuene(T val)
	{
		if (IsFull())
			return 0;//队满
		data[rear]=val;
		rear=(rear+1)%MAX_SIZE;
		return 1;
	}
	T DeQueue()
	{
		if (IsEmpty())
			return -8888889;//队空
		T val=data[front];
		front=(front+1)%MAX_SIZE;
		return val;
	}
	T& GetFront()
	{
		assert(!IsEmpty());
		return data[front];
	}
	void Traverse()
	{
		if (IsEmpty())
			cout<<"队列为空!
";
		else
		{
			int pos=front;
			while (pos!=rear)
			{
				cout<<data[pos]<<endl;
				pos=(pos+1)%MAX_SIZE;
			}
		}
	}
};

链式栈实现杨辉三角

/************************************************************************/
/* 链式栈实现杨辉三角 */
/************************************************************************/
 #include "QueueList.h"
 #include <iostream>
using namespace std;
template <class T>
 void Assign(QueueList<T>&Org,QueueList<T>&iter)
 {
 	Org.SetNull();
 	while (!iter.IsEmpty())
 	{
 		T temp=iter.DeQueue();
 		Org.EnQueue(temp);
 	}
 }
 void main()
 {
 
 	int n;
 	cout<<"显示的行数(>=3):
";
 	cin>>n;
 	QueueList<int> Org;
 	Org.EnQueue(1);
 	Org.Traverse();
 	cout<<endl;
 	for (int i=1;i<n;i++)
 	{
 		QueueList<int> Iter;
 		Iter.EnQueue(1);
 		while (!Org.IsEmpty())
 		{
 			int OutQueue=Org.DeQueue();
 			Iter.EnQueue(OutQueue+Org.GetFront());
 		}
 		Iter.Traverse();
 		cout<<'
';
 		Assign(Org,Iter);
 	}
 system("pause");

 }

游程编码问题

/************************************************************************/
/* 游程编码问题 */
/************************************************************************/
#include "QueueList.h"

void main()
{
	char a;
	QueueList<char> myQlist;
	cout<<"输入0,1序列,以#结束:
";
	while (cin>>a && a!='#')
	{
		myQlist.EnQueue(a);
	}
	int count=0;
	char temp; 
	char first=myQlist.GetFront();
	while (!myQlist.IsEmpty())
	{
		temp=myQlist.DeQueue();
		if (temp==first)
		{
			count++;
		}
		else
		{
			cout<<count;
			count=1;
		}
		first=temp;
	}
	cout<<count;
}

栈节点

StackNode.h
#pragma once
#include <stdlib.h>
template<class T>class StackNode
{
public:
	T data;
	StackNode<T>* next;
	StackNode(T value):next(NULL),data(value){}
};

链式栈

Stack.h
#include "StackNode.h"
#include <iostream.h>
template<class T> class Stack
{
private:
	StackNode<T>* top;
public:
	Stack():top(NULL){}
	void Push(T val)
	{
		StackNode<T>* add=new StackNode<T>(val);
		add->next=top;
		top=add;
	}
	T Pop()
	{
		if (IsEmpty())
			return -1;
		StackNode<T>* del=top;
		top=top->next;
		T data=del->data;
		delete del;
		return data;
	}
	bool IsEmpty()
	{
		return top==NULL;
	}
	T GetTop()
	{
		return top->data;
	}
	void MakeEmpty()
	{
		StackNode<T>* del=top;
		while (top)
		{
			top=top->next;
			delete top;
		}
	}
	void TraverseStack()
	{
		StackNode<T>* p=top;
		while (p)
		{
			cout<<p->data<<endl;
			p=p->next;
		}
	}
};

括号匹配

/************************************************************************/
/* 括号匹配 */
/************************************************************************/
#include "Stack.h"
void main()
{
	Stack<char> myStack;
	char a;
	cout<<"请输入括号形式(以0结束)
";
	while (cin>>a&&a!='0')
	{
		switch (a)
		{
		case '(' :
			myStack.Push(a);
			break;
		case ')' :
			if (!myStack.IsEmpty())
			{	
				myStack.Pop();
				break;
			}
		}
	}
	if (myStack.IsEmpty())
	{
		cout<<"Ok!"<<endl;
	}
	else
			cout<<"Wrong!"<<endl;
}