链队列实例C++代码实现

心已赠人 2022-10-27 06:19 139阅读 0赞

list\_queue.h

#pragma once
    #define Queue_Datatype int
    #define Init_QueueData 99
    #include<iostream>
    
    class Queue_Node {
        
    public:
    	Queue_Node() {
        
    		data = Init_QueueData;
    		next = NULL;
    	}
    
    	Queue_Node(Queue_Datatype x) : data(x), next(NULL) {
        
    
    	}
    
    	Queue_Datatype data;
    	Queue_Node *next;
    };
    
    class MyQueue
    {
        
    public:
    	MyQueue();
    	MyQueue(int size);
    	~MyQueue();
    
    	void Init_Queue();		//	初始化队列
    	void Destory_Queue();	//	摧毁队列
    	void Clear_Queue();		//	清空队列
    
    	bool Queue_Empty();		//	是否为空队列
    	int Queue_Size();		//  队列长度
    
    	int Queue_Head();		//	获取队头数据
    	bool Queue_Push(Queue_Datatype x);		//	入队
    	bool Queue_Pop();		//	出队
    
    	void Print_Queue();		//  遍历队列
    
    private:
    	Queue_Node* front;				//	队头
    	Queue_Node* rear;				//	队尾
    };

list\_queue.cpp

#include "list_queue.h"
    #include <iostream>
    
    MyQueue::MyQueue()
    {
        
    	Init_Queue();
    }
    
    MyQueue::MyQueue(int size)
    {
        
    	Init_Queue();
    	for (int i = 0; i < size; i++) {
        
    		Queue_Datatype temp;
    		std::cin >> temp;
    		Queue_Push(temp);
    	}
    }
    
    MyQueue::~MyQueue()
    {
        
    	Clear_Queue();
    	Destory_Queue();
    }
    
    
    void MyQueue::Init_Queue()
    {
        
    	Queue_Node *temp = new(std::nothrow) Queue_Node;
    	if (!temp)
    		std::exit(1);
    	front = temp;
    	rear = temp;
    }
    
    void MyQueue::Destory_Queue()
    {
        
    	delete(front);
    }
    
    void MyQueue::Clear_Queue()
    {
        
    	if (Queue_Empty())    
    		return;
    
    	Queue_Node *cur = front->next;
    	Queue_Node *next = cur->next;
    
    	while (cur != rear) 
    	{
            
    		delete(cur);
    		cur = next;
    		next = next->next;
    	}
    
    	delete(rear);
    	rear = front;
    }
    
    bool MyQueue::Queue_Empty()
    {
        
    	return (front == rear) ? true : false;
    }
    
    int MyQueue::Queue_Size()
    {
        
    	int num = 0;
    	Queue_Node *temp = front;
    	while (temp!=rear)
    	{
        
    		num++;
    		temp = temp->next;
    	}
    	return num;
    }
    
    int MyQueue::Queue_Head()
    {
        
    	if (Queue_Empty())
    		std::cout << "队列为空" << std::endl;
    		return false;
    	Queue_Datatype value = front->next->data;
    	return value;
    }
    
    bool MyQueue::Queue_Push(Queue_Datatype x)
    {
        
    	Queue_Node* temp = new(std::nothrow) Queue_Node(x);
    
    	if (!temp)
    		std::exit(1);
    
    	rear->next = temp;
    	rear = temp;
    
    	return true;
    }
    
    bool MyQueue::Queue_Pop()
    {
        
    	if (Queue_Empty())
    		std::cout << "队列为空" << std::endl;
    	return false;
    
    	if (Queue_Size() == 1) {
        
    		delete(front->next);
    		front->next = NULL;
    		rear = front;
    	}
    	else {
        
    		Queue_Node* node = front->next;
    		front->next = node->next;
    		delete(node);
    	}
    
    	return true;
    }
    
    void MyQueue::Print_Queue()
    {
        
    	Queue_Node* cur = front->next;
    
    	while (cur != NULL) 
    	{
        
    		std::cout << cur->data << std::endl;
    		cur = cur->next;
    	}
    }

test.cpp

#include "list_queue.h"
    #include <iostream>
    
    int main()
    {
        
    	std::cout << "请输入元素： " << std::endl;
    	MyQueue a(3);
    	std::cout << "队列长度： " << a.Queue_Size() << std::endl;
    	a.Print_Queue();
    
    	a.Queue_Push(10);
    	std::cout << "插入元素后的队列遍历： " << std::endl;
    	a.Print_Queue();
    
    	std::cout << "队头元素： " << a.Queue_Head() << std::endl;
    	system("pause");
    	return 0;
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY0NTI4MQ_size_16_color_FFFFFF_t_70]: /images/20221024/bf89986c66c44964a3813614489f56cb.png