链栈的压栈和出栈

╰半夏微凉° 2022-06-07 10:51 347阅读 0赞

#include<iostream>
    
    using namespace std;
    
    typedef float datatype;
    
    struct node //节点类型定义
    
    {
    
    	datatype data;
    
    	struct node *next;
    
    };
    
    class linkstack //栈结构定义
    
    {
    
    public:
    
    	linkstack(){top=NULL;}  //构造函数，初始化一个空链栈
    
    	~linkstack();			//析构函数，释放链栈中各结点的储存空间
    
    	void push(datatype x); //入栈操作，将元素x入栈
    
    	datatype pop();			//出栈操作，将栈顶元素出栈
    
    	datatype getpop();		//取栈顶元素（并不删除）
    
    	bool IsEmpty(){return (NULL==top)?true:false;} //判空操作，判断链栈是否为空栈，栈空则返回1，栈非空则返回0
    
    private:
    
    	struct node *top;		//栈顶指针即链栈的头指针
    
    };
    
    linkstack::~linkstack()
    
    {
    
    	while(top)
    
    	{
    
    		node *p=top;       //暂存被释放的结点
    
    		top = top->next; //top指向被释放结点的下一个结点
    
    		delete p;
    
    	}
    
    }
    
    void linkstack::push(datatype x)
    
    {
    
    	node *p=new node;	//申请一个数据域为x的结点
    
    	p->data=x;		
    
    	p->next = top;		//将节点插在栈顶
    
    	top=p;
    
    }
    
    datatype linkstack::pop()
    
    {
    
    	if (IsEmpty()) throw "下溢";
    
    	datatype x=top->data;		//暂存栈顶元素
    
    	node *p=top;
    
    	top=top->next;				//将栈顶结点摘链
    
    	delete p;
    
    	return x;
    
    }
    
    datatype linkstack::getpop()
    
    {
    
    	if(top!=NULL)
    
    		return top->data;       //返回栈顶指针top所指结点的数据域
    
    	else
    
    		cout<<"Stack is Empty !"<<endl;
    
    }
    
    int main()
    
    {
    
    	linkstack mystack;
    
    	cout <<"Is stack Empty:" << mystack.IsEmpty() << endl;
    
    	for(int i = 0;i < 10;i++)
    	{
    		mystack.push(i);
    		cout<<i<<endl;
    	}
    
    
    
    	cout <<"Is stack Empty:" << mystack.IsEmpty() << endl;
    	for(int i=0;i<10;i++){
    		cout <<"The top of the stack is :" << mystack.getpop() << endl;
    
    		mystack.pop();
    	}
    
    
    	cout <<"Is stack Empty:" << mystack.IsEmpty() << endl;
    
    	system("pause");
    
    	return 0;
    
    }

运行结果：

![Center][]

[Center]: /images/20220607/8801eecc348d41fbb02e9536cfdc1afc.png