貓狗隊列

功能要求：

• 用戶可以調用push方法將cat類或dog類的實例放入隊列中;
• 用戶可以調用pollAll方法，將隊列中所有的實例按照進隊列的先后順序依次彈出;
• 用戶可以調用pollDog方法，將隊列中dog類的實例按照進隊列的先后順序依次彈出;
• 用戶可以調用pollCat方法,將隊列中cat類的實例按照進隊列的先后順序依次彈出;
• 用戶可以調用isEmpty方法，檢查隊列中是否還有dog或cat的實例;
• 用戶可以調用isDogEmpty方法，檢查隊列中是否有dog類的實例;
• 用戶可以調用isCatEmpty方法，檢查隊列中是否有cat類的實例。

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Pet.h

#ifndef _PET_H
#define _PET_H
#include <string>
using namespace std;class Pet{
private:string type;public:Pet(){}Pet(string type){this->type = type;}string getPetType(){return type;}
};class Dog :public Pet{
public:Dog() :Pet("dog") {}
};class Cat :public Pet{
public:Cat() :Pet("cat") {}
};#endif

PetEnterQueue.h

#ifndef _PETENTERQUEUE_H
#define _PETENTERQUEUE_H
#include "Pet.h"
using namespace std;class PetEnterQueue {
private:Pet pet;long count;
public:PetEnterQueue(Pet pet, long count) {this->pet = pet;this->count = count;}Pet getPet() {return this->pet;}long getCount() {return this->count;}string getEnterPetType() {return this->pet.getPetType();}
};
#endif

CatDogQueue.h

#ifndef _CATDOGQUEUE_H
#define _CATDOGQUEUE_H
#include"PetEnterQueue.h"
#include"Pet.h"
#include<iostream>
#include<queue>
using namespace std;class CatDogQueue {
private:queue<PetEnterQueue> dogQ;queue<PetEnterQueue> catQ;long count;public:void push(Pet pet){if (pet.getPetType() == "dog") {this->dogQ.push(PetEnterQueue(pet, count++));}else if(pet.getPetType()=="cat"){this->catQ.push(PetEnterQueue(pet, count++));}}Pet popAll() {if (!catQ.empty() && !dogQ.empty()){if (dogQ.front().getCount() < catQ.front().getCount()){Pet tmp = dogQ.front().getPet();dogQ.pop();return tmp;}else{Pet tmp = catQ.front().getPet();catQ.pop();return tmp;}}else if (!catQ.empty()){Pet tmp = catQ.front().getPet();catQ.pop();return tmp;}else if (!dogQ.empty()){Pet tmp = dogQ.front().getPet();dogQ.pop();return tmp;}else{throw runtime_error("Error empty queue.");}}Dog popDog(){if (!dogQ.empty()){Pet tmpP = dogQ.front().getPet();Dog tmpD;Pet* pd = &tmpD;*pd = tmpP;dogQ.pop();return tmpD;}else{throw runtime_error("Error empty dog queue.");}}Cat popCat(){if (!catQ.empty()){Pet tmpP = catQ.front().getPet();Cat tmpC;Pet* pc = &tmpC;*pc = tmpP;catQ.pop();return tmpC;}else{throw runtime_error("Error empty cat queue.");}}bool isEmpty(){return dogQ.empty() && catQ.empty();}bool isDogEmpty(){return dogQ.empty();}bool isCatEmpty(){return catQ.empty();}
};#endif

test.cpp

#include <iostream>
#include "CatDogQueue.h"using namespace std;
int main()
{CatDogQueue test;if (test.isEmpty())cout << "All queue is empty!" << endl;test.push(Dog());if (!test.isEmpty())cout << "All queue is not empty!" << endl;if (!test.isDogEmpty())cout << "Dog queue is not empty!" << endl;if (test.isCatEmpty())cout << "Cat queue is Empty!" << endl;for (int i = 0; i < 2; i++){test.push(Cat());test.push(Dog());}cout << "popAll:" << test.popAll().getPetType() << endl;cout << "popDog:" << test.popDog().getPetType() << endl;cout << "popCat:" << test.popCat().getPetType() << endl;cout << "popAll:" << test.popAll().getPetType() << endl;cout << "popAll:" << test.popAll().getPetType() << endl;if (test.isEmpty())cout << "All queue is empty!" << endl;return 0;

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