链栈和链队列的类实现

Posted 2020-08-15 体育.委员

#include<iostream>
#include<cassert>

using namespace std;

template <class T>//链栈
struct LinkNode{
T data;
LinkNode<T> *Link;
LinkNode(LinkNode<T> *pr=NULL){Link=pr;}
LinkNode(const T& item,LinkNode<T> *pr=NULL){
data=item;
Link=pr;
}
};
template<class T>
class LinkedStack{
public:
LinkedStack()
{
top = NULL;
}
~LinkedStack() {makeEmpty();}
void Push(const T&x);
bool Pop(T &x);
bool getTop(T &x);
bool IsEmpty()const{return (top == NULL)?true:false;}
int getSize()const;
void makeEmpty();
void output();
protected:
LinkNode<T> *top;
};

template<class T>
void LinkedStack<T>::makeEmpty(){
LinkNode<T> *p;
while(top!=NULL)
{
p = top;
top = top->Link;
delete p;
}
}

template<class T>
void LinkedStack<T>::Push(const T& x){
top = new LinkNode<T>(x,top);
assert(top!=NULL);
}

template<class T>
bool LinkedStack<T>::Pop(T& x){
if(IsEmpty()==true)return false;
LinkNode<T> *p = top;
top = top->Link;
x = p->data;
delete p;
return true;
}

template<class T>
bool LinkedStack<T>::getTop(T& x){
if(IsEmpty()==true)return false;
x = top->data;
return true;
}

template<class T>
int LinkedStack<T>::getSize()const{
LinkNode<T> *p = top;
int k = 0;
while(p!=NULL)
{
p = p->Link;
k++;
}
return k;
}

template<class T>
void LinkedStack<T>::output(){
LinkNode<T> *p = top;
while(p!=NULL)
{
cout << p->data << " ";
p = p->Link;

}
}

template <class T>//链队列
class LinkedQueue
{ public:
LinkedQueue() { rear=front=new LinkNode<T>; }
~LinkedQueue() { makeEmpty(); }
bool EnQueue(T x);
bool DeQueue(T& x);
bool getFront(T& x);
void makeEmpty();
bool IsEmpty() const { return front == rear; }
int getSize();
void output();
private:
LinkNode<T> *front, *rear; //队头、队尾指针
};

template <class T>
bool LinkedQueue<T>::EnQueue(T x)
{ //入队列，将新元素x插到队尾
if (front == NULL) return false;
rear->Link = new LinkNode<T> (x);
if (rear->Link == NULL) return false;
rear = rear->Link;
return true;
}
template <class T>
bool LinkedQueue<T>::DeQueue(T& x)
{ //出队列，从队头取元素x，并删除首个数据结点
if (IsEmpty() == true) return false; //判队空
LinkNode<T> *p = front->Link;
x = p->data;
front->Link = p->Link;
if(p==rear) rear=front; //修改尾指针
delete p;
return true;
}
template <class T>
bool LinkedQueue<T>::getFront(T& x)
{ //若队列不空，则函数取队头元素的值
if (IsEmpty() == true) return false;
x = front->Link->data;
return true;
}
template <class T>
void LinkedQueue<T>::makeEmpty()
{ //将链表置为空表
LinkNode<T> *q;
while ( front->Link != NULL)
{
q = front->Link; //q指向被删结点
front->Link = q->Link; //从链上删除该结点
delete q; //释放结点空间
}
rear=front; //修改尾指针
}
template <class T>
int LinkedQueue<T>::getSize() //计算链队列的长度
{ LinkNode<T> *p=front->Link;
int count=0;
while(p!=NULL)
{ p=p->Link; count++; }
return count;
}
template <class T>
void LinkedQueue<T>::output() //输出链队列
{ LinkNode<T> *p=front->Link;
if(p==NULL) { cout<<"空队列!"; return; }
while(p!=NULL)
{
if(p->data==0)
break;
cout<<p->data<<" "; p=p->Link;
}
cout<<endl;
}

void input(LinkedQueue<int>& Q,LinkedQueue<int>& s)
{
int x=1;
while(x!=0)
{
cin>>x;
Q.EnQueue(x);
}
while(x!=0)
{
cin>>x;
s.EnQueue(x);
}
while




}
int main(){
LinkedQueue<int>s;
LinkedQueue<int> Q;
input(Q,s);

return 0;
}
/*void InitQueue(LinkedQueue<int>& Q ) //初始化一个有头结点的空的链队列
{
}
void InitStack(LinkedStack<int>& s) //初始化一个有头结点的空的链队列
{
}
void DestroyQueue(LinkedQueue<int>& Q ){}
void DestroyStack(LinkedStack<int>& s){}
int main( )
{
LinkedStack<int> s;
LinkedQueue<int> Q;
int e;
InitQueue(Q);
InitStack(s);
cout<<("输入若干整数, 以空格间隔, 以0为结束:\n");
while(1)
{
scanf("%d", &e);
if(e==0)
break;
Q.EnQueue(e);
}
while(Q.IsEmpty()!=true)
{
Q.DeQueue(e);
s.Push(e);
}
s.output();
DestroyQueue(Q);
DestroyStack(s);
return 0;
}
*/