《数据结构、算法与应用C++语言描述》使用C++语言实现链表队列

《数据结构、算法与应用C++语言描述》使用C++语言实现链表队列

定义

队列的定义

队列（queue）是一个线性表，其插入和删除操作分别在表的不同端进行。插入元素的那一端称为队尾（back或rear），删除元素的那一端称为队首（front）。

队列的抽象数据类型

链表队列代码

_17queue.h

抽象类栈。

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日17点38分
Last Version:			V1.0
Descriptions:			队列的抽象类
*/
#pragma once
#ifndef _QUEUE_H_
#define _QUEUE_H_
template<class T>
class queue
{
public:
	virtual ~queue() {}
	virtual bool empty() const = 0;//返回true,当且仅当队列为空
	virtual int size() const = 0;//返回队列中元素个数
	virtual T& front() = 0;//返回头元素的引用
	virtual T& back() = 0;//返回尾元素的引用
	virtual void pop() = 0;//删除首元素
	virtual void push(const T& theElement) = 0;//把元素theELment加入队尾
};
#endif

_6chainNode.h

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日22点06分
Last Version:			V1.0
Descriptions:			链表的结点
*/
#pragma once
#ifndef _CHAINNODE_H_
#define _CHAINNODE_H_
template <class T>
struct chainNode
{
	//数据成员
	T element;
	chainNode<T>* next;
	//方法
	chainNode() {}
	chainNode(const T& element)
	{
		this->element = element;
		this->next = nullptr;
	}

	chainNode(const T& element, chainNode<T>* next)
	{
		this->element = element;
		this->next = next;
	}
};
#endif

_21linkedQueue.h

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日17点38分
Last Version:			V1.0
Descriptions:			链表存储的队列的头文件
*/
#pragma once
#ifndef _LINKEDQUEUE_H_
#define _LINKEDQUEUE_H_
#include
#include
#include "_1myExceptions.h"
#include "_6chainNode.h"
#include "_17queue.h"
/*测试函数*/
void linkedQueueTest();

using namespace std;
template<class T>
class linkedQueue : public queue<T>
{
public:
    /*成员函数*/
    linkedQueue(int initialCapacity = 10)
    {
        theFront = theBack = nullptr;
        queueSize = 0;
    }
    ~linkedQueue();
    bool empty() const { return queueSize == 0; }
    //返回队列的元素个数
    int size() const { return queueSize; }
    /*清空队列中的元素*/
    void clear();
    /*返回第一个元素*/
    T& front() { return theFront->element; }
    /*返回最后一个元素*/
    T& back() { return theBack->element; }
    /*删除队首元素*/
    void pop()
    {
        chainNode<T>* next = theFront->next;
        delete theFront;
        theFront = next;
        queueSize--;
    }
    /*向队尾插入元素theElement*/
    void push(const T& theElement)
    {
        if (queueSize == 0)
            theFront = theBack = new chainNode<T>(theElement, nullptr);
        else
        {
            theBack->next = new chainNode<T>(theElement, nullptr);
            theBack = theBack->next;
        }       
        queueSize++;
    }
    //void meld(arrayQueue& a, arrayQueue& b);//合并队列a,b到当前队列
    //void split(arrayQueue& a, arrayQueue& b);//将当前队列分成两个队列a,b

    /*重载操作符*/
    /*重载[]操作符*/
    T operator[](int i)
    {
        chainNode<T>* currentNode = theFront;
        for (int j = 0; j < i; j++)
            currentNode = currentNode->next;
        return currentNode->element;
    }

    /*友元函数*/
    friend istream& operator>> <T>(istream& in, linkedQueue<T>& m);
    //输出但是不pop()元素
    friend ostream& operator<< <T>(ostream& out, linkedQueue<T>& m);
private:
    chainNode<T>* theFront;       // 指向第一个元素的指针
    chainNode<T>* theBack;        // 指向最后一个元素的指针
    int queueSize;    // 队列的容量，实质上比队列容量(不包含queueFront指向的那一个位置)大1
};
/*友元函数*/
/*>>操作符*/
template<class T>
istream& operator>>(istream& in, linkedQueue<T>& m)
{
    int numberOfElement = 0;
    cout << "Please enter the number of element:";
    while (!(in >> numberOfElement))
    {
        in.clear();//清空标志位
        while (in.get() != '\n')//删除无效的输入
            continue;
        cout << "Please enter the number of element:";
    }
    T cinElement;
    for (int i = 0; i < numberOfElement; i++)
    {
        cout << "Please enter the element " << i + 1 << ":";
        while (!(in >> cinElement))
        {
            in.clear();//清空标志位
            while (in.get() != '\n')//删除无效的输入
                continue;
            cout << "Please enter the element " << i + 1 << ":";
        }
        m.push(cinElement);
    }
    return in;
}
//输出但是不pop()元素
/*<<操作符*/
template<class T>
ostream& operator<<(ostream& out, linkedQueue<T>& m)
{
    chainNode<T>* currentNode = m.theFront;
    while(currentNode != nullptr)
    {
        cout << currentNode->element << " ";
        currentNode = currentNode->next;
    }
    out << endl;
    return out;
}
/*成员函数*/
/*析构函数*/
template<class T>
linkedQueue<T>::~linkedQueue()
{
    chainNode<T>* nextNode = theFront;
    while (nextNode != nullptr)
    {
        nextNode = nextNode->next;
        delete theFront;
        theFront = nextNode;
    }
}
/*清空队列中的元素*/
template<class T>
void linkedQueue<T>::clear()
{
    chainNode<T>* nextNode = theFront;
    while (nextNode != nullptr)
    {
        nextNode = nextNode->next;
        delete theFront;
        theFront = nextNode;
    }
    queueSize = 0;
    theFront = theBack = nullptr;
}

#endif

_21linkedQueue.cpp

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日17点38分
Last Version:			V1.0
Descriptions:			测试_21linkedQueue.h头文件中的所有函数
*/
#include 
#include 
#include "_21linkedQueue.h"
using namespace std;
/*测试函数*/
void linkedQueueTest()
{
	cout << endl << "*********************************linkedQueueTest()函数开始*************************************" << endl;
	linkedQueue<int> a;

	//测试输入和输出
	cout << endl << "测试友元函数*******************************************" << endl;
	cout << "输入输出************************" << endl;
	cin >> a;
	cout << "linkedQueue a is:" << a;
	cout << endl << "测试成员函数*******************************************" << endl;
	cout << "empty()*************************" << endl;
	cout << "a.empty() = " << a.empty() << endl;
	cout << "size()**************************" << endl;
	cout << "a.size() = " << a.size() << endl;
	cout << "push()**************************" << endl;
	cout << "before push linkedQueue a is:" << a;
	a.push(99);
	a.push(22);
	cout << "after push linkedQueue a is:" << a;
	cout << "front()*************************" << endl;
	cout << "a.front() = " << a.front() << endl;
	cout << "back()**************************" << endl;
	cout << "a.back() = " << a.back() << endl;
	cout << "pop()***************************" << endl;
	cout << "before pop linkedQueue a is:" << a;
	a.pop();
	a.pop();
	cout << "after pop linkedQueue a is:" << a;
	cout << "clear()*************************" << endl;
	a.clear();
	cout << "after clear linkedQueue a is:" << a;

	cout << endl << "测试成员函数性能***************************************" << endl;
	cout << "push()**************************" << endl;
	linkedQueue<int> f;
	double clocksPerMillis = double(CLOCKS_PER_SEC) / 1000;
	clock_t startTime = clock();
	for (int i = 0; i < 100000000; i++)
		f.push(i);
	double pushTime = (clock() - startTime) / clocksPerMillis;
	cout << 10000 << " push took " << pushTime << " ms" << endl;

	cout << "*********************************linkedQueueTest()函数结束*************************************" << endl;
}

main.cpp

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日17点38分
Last Version:			V1.0
Descriptions:			main()函数，控制运行所有的测试函数
*/
#include 
#include "_18arrayQueue.h"


int main()
{
	arrayQueueTest();
	return 0;
}

_1myExceptions.h

/*
Project name :			allAlgorithmsTest
Last modified Date:		2022年8月13日17点38分
Last Version:			V1.0
Descriptions:			综合各种异常
*/
#pragma once
#ifndef _MYEXCEPTIONS_H_
#define _MYEXCEPTIONS_H_
#include 
#include

using namespace std;

// illegal parameter value
class illegalParameterValue 
{
   public:
      illegalParameterValue(string theMessage = "Illegal parameter value")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// illegal input data
class illegalInputData 
{
   public:
      illegalInputData(string theMessage = "Illegal data input")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// illegal index
class illegalIndex 
{
   public:
      illegalIndex(string theMessage = "Illegal index")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// matrix index out of bounds
class matrixIndexOutOfBounds 
{
   public:
      matrixIndexOutOfBounds
            (string theMessage = "Matrix index out of bounds")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// matrix size mismatch
class matrixSizeMismatch 
{
   public:
      matrixSizeMismatch(string theMessage = 
                   "The size of the two matrics doesn't match")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// stack is empty
class stackEmpty
{
   public:
      stackEmpty(string theMessage = 
                   "Invalid operation on empty stack")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// queue is empty
class queueEmpty
{
   public:
      queueEmpty(string theMessage = 
                   "Invalid operation on empty queue")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// hash table is full
class hashTableFull
{
   public:
      hashTableFull(string theMessage = 
                   "The hash table is full")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// edge weight undefined
class undefinedEdgeWeight
{
   public:
      undefinedEdgeWeight(string theMessage = 
                   "No edge weights defined")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};

// method undefined
class undefinedMethod
{
   public:
      undefinedMethod(string theMessage = 
                   "This method is undefined")
            {message = theMessage;}
      void outputMessage() {cout << message << endl;}
   private:
      string message;
};
#endif