带链的队列，入队，退队，检测带链队列的状态

代码：

#include<iostream>
using namespace std;
template<class T>
struct node
{
	T d;
	node *next;

};
template<class T>
class linked_Queue
{
	private:
		node<T> *front;
		node<T> *rear;
	public:
		linked_Queue();
		void prt_linked_Queue();
		int flag_linked_Queue();
		void ins_linked_Queue(T);
		T del_linked_Queue();
};
template<class T>
linked_Queue<T>::linked_Queue()
{
	front=NULL;
	rear=NULL;
	return;
}
template<class T>
void linked_Queue<T>::prt_linked_Queue()
{
	node<T> *p;
	p=front;
	if(p==NULL)
	{
		cout<<"空队列！"<<endl;return;
	}
	do
	{
		cout<<p->d<<endl;
		p=p->next;
	}while(p!=NULL);
	return;
}
template<class T>
int linked_Queue<T>::flag_linked_Queue()
{
	if(front==NULL) return(0);
	return(1);
}
template<class T>
void linked_Queue<T>::ins_linked_Queue(T x)
{
	node<T> *p;
	p=new node<T>;
	p->d=x;
	p->next=NULL;
	if(rear==NULL)
		front=p;
	else
		rear->next=p;
	rear=p;
	return;
}
template<class T>
T linked_Queue<T>::del_linked_Queue()
{
	T y;
	node<T> *q;
	if(front==NULL)
	{
		cout<<"空队！"<<endl;
		return(0);
	}
	y=front->d;
	q=front;
	front=q->next;
	delete q;
	if(front==NULL)rear=NULL;
	return(y);
}
int main()
{
	linked_Queue<int>q;
	q.ins_linked_Queue(50);
	q.ins_linked_Queue(60);
	q.ins_linked_Queue(70);
	q.ins_linked_Queue(80);
	q.ins_linked_Queue(90);
	q.ins_linked_Queue(100);
	cout<<"输出带链队列中的元素："<<endl;
	q.prt_linked_Queue();
	if(q.flag_linked_Queue())
		cout<<"输出退队元素："<<q.del_linked_Queue()<<endl;
	if(q.flag_linked_Queue())
		cout<<"输出退队元素："<<q.del_linked_Queue()<<endl;
	if(q.flag_linked_Queue())
		cout<<"输出退队元素："<<q.del_linked_Queue()<<endl;
	cout<<"再次输出带链队列中的元素："<<endl;
	q.prt_linked_Queue();
	return 0;
}

运行结果