链式队列

template<typename Type> class LinkQueue;

template<typename Type> class QueueNode{
private:
	friend class LinkQueue<Type>;
	QueueNode(const Type item,QueueNode<Type> *next=NULL)
		:m_data(item),m_pnext(next){}
private:
	Type m_data;
	QueueNode<Type> *m_pnext;
};

#include "QueueNode.h"

template<typename Type> class LinkQueue{
public:
	LinkQueue():m_prear(NULL),m_pfront(NULL){}
	~LinkQueue(){
		MakeEmpty();
	}
	void Append(const Type item);   //insert data
	Type Delete();                  //delete data
	Type GetFront();                //get data
	void MakeEmpty();               //make the queue empty
    void Print();                   //print the queue

	bool IsEmpty() const{
		return m_pfront==NULL;
	}

private:
	QueueNode<Type> *m_prear,*m_pfront;
};

template<typename Type> void LinkQueue<Type>::MakeEmpty(){
	QueueNode<Type> *pdel;
	while(m_pfront){
		pdel=m_pfront;
		m_pfront=m_pfront->m_pnext;
		delete pdel;
	}
}

template<typename Type> void LinkQueue<Type>::Append(const Type item){
	if(m_pfront==NULL){
		m_pfront=m_prear=new QueueNode<Type>(item);
	}
	else{
		m_prear=m_prear->m_pnext=new QueueNode<Type>(item);
	}
}

template<typename Type> Type LinkQueue<Type>::Delete(){
	if(IsEmpty()){
		cout<<"There is no element!"<<endl;
		exit(1);
	}
	QueueNode<Type> *pdel=m_pfront;
	Type temp=m_pfront->m_data;
	m_pfront=m_pfront->m_pnext;
	delete pdel;
	return temp;
}

template<typename Type> Type LinkQueue<Type>::GetFront(){
	if(IsEmpty()){
		cout<<"There is no element!"<<endl;
		exit(1);
	}
	return m_pfront->m_data;
}

template<typename Type> void LinkQueue<Type>::Print(){
	QueueNode<Type> *pmove=m_pfront;
	cout<<"front";
	while(pmove){
		cout<<"--->"<<pmove->m_data;
		pmove=pmove->m_pnext;
	}
	cout<<"--->rear"<<endl<<endl<<endl;
}

#include <iostream>

using namespace std;

#include "LinkQueue.h"

int main(){
	LinkQueue<int> queue;
	int init[10]={1,3,6,8,9,2,0,5,4,7};

	for(int i=0;i<10;i++){
		queue.Append(init[i]);
	}
	queue.Print();

	queue.Delete();
	queue.Print();

	cout<<queue.GetFront()<<endl;
	queue.Print();

	queue.MakeEmpty();
	queue.Print();

	queue.Delete();

	return 0;
}