【27续】c++项目练习

定义一个或多个类，来描述以下需求：

汽车，有多个轮胎，一个发动机，品牌，型号, 价格， 行驶里程。

轮胎，有品牌，尺寸，气压。

发动机，有品牌，型号。

自编代码如下：（不是参考答案，只是我自己写的代码，但是也是可以跑通的） 

Engine

.h

#pragma once
#include <string>

using namespace std;

class Engine
{
public:
	Engine();
	Engine(const string engineBrand, float engineVersion);
	~Engine();

	string getEngineBrand();
	float getEngineVersion();
	string discription();

private:
	string engineBrand;
	float engineVersion;
};

 .cpp

#include "Engine.h"
#include <sstream>

Engine::Engine()
{
}

Engine::Engine(const string engineBrand, float engineVersion)
{
	this->engineBrand = engineBrand;
	this->engineVersion = engineVersion;
}

Engine::~Engine()
{
}

string Engine::getEngineBrand()
{
	return engineBrand;
}

float Engine::getEngineVersion()
{
	return engineVersion;
}

string Engine::discription()
{
	stringstream ret;
	ret << "品牌-" << engineBrand << " 版本-" << engineVersion;
	return ret.str();
}

 Tire

.h

#pragma once
#include <string>

using namespace std;

class Tire
{
public:
	Tire();
	Tire(string tireBrand);
	~Tire();

	string getTireBrand();
	float getPressure();
	float getSzie();
	string discription();

private:
	string tireBrand;
	float pressure = 2.5;
	float size = 1.0;

};

 .cpp

#include "Tire.h"
#include <sstream>


Tire::Tire()
{
}

Tire::Tire(string tireBrand)
{
    this->tireBrand = tireBrand;
}

Tire::~Tire()
{
}

string Tire::getTireBrand()
{
    return tireBrand;
}

float Tire::getPressure()
{
    return pressure;
}

float Tire::getSzie()
{
    return size;
}

string Tire::discription()
{
    stringstream ret;
    ret << "品牌-" << tireBrand << " 气压-" << pressure << " 尺寸-" << size;
    return ret.str();
}

Car

 .h

#pragma once
#include <string>
#include "Engine.h"
#include "Tire.h"

using namespace std;


class Car
{
public:
	Car();
	Car(string carBrand, float carVersion, int carPrice, int carMiles, string engineBrand, float engineVersion, string tireBrand);
	~Car();

	string getCarBrand();
	float getCarVersion();
	int getCarPrice();
	int getCarMiles();
	Engine getEngine();
	Tire* getTire(int i);
	string discription();

private:
	string carBrand;
	float carVersion;
	int carPrice;
	int carMiles=0;
	Engine engine;
	Tire tire[4];
};

.cpp

#include "Car.h"
#include <sstream>

using namespace std;

Car::Car()
{
}

Car::Car(string carBrand, float carVersion, int carPrice, int carMiles, string engineBrand, float engineVersion, string tireBrand) :engine(engineBrand, engineVersion), tire{ tireBrand,tireBrand,tireBrand,tireBrand }
{
	this->carBrand = carBrand;
	this->carVersion = carVersion;
	this->carPrice = carPrice;
	this->carMiles = carMiles;
}

Car::~Car()
{
}

string Car::getCarBrand()
{
	return carBrand;
}

float Car::getCarVersion()
{
	return carVersion;
}

int Car::getCarPrice()
{
	return carPrice;
}

int Car::getCarMiles()
{
	return carMiles;
}

Engine Car::getEngine()
{
	return engine;
}

Tire* Car::getTire(int i)
{
	if (i >= 1 || i <= 4) {
		return &tire[4];
	}
	return NULL;
}

string Car::discription()
{
	stringstream ret;
	ret << "品牌-" << carBrand << " 型号-" << carVersion << " 价格-" << carPrice << " 里程数-" << carMiles << "\t\t引擎-" << engine.discription() << "\t\t轮胎-" << tire->discription();
	return ret.str();
}

main

.h

#include "Car.h"
#include <iostream>

using namespace std;

int main(void) {
	{
		Car car("宝马", 7.0, 950000, 56000, "宝马", 3.5, "米其林");
		cout << car.discription() << endl;
	}

	system("pause");

	return 0;
}