项目训练3

题目：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。

Car.h

#pragma once
#include "Tire.h"
#include "Engine.h"
#include <sstream>
#include <iostream>

class Car
{
public:
	Car(const string &carBrand,const string &carVer,int carPrice,const string &engineBrand,float engineVer,const string &tireBrand="米其林");
	~Car();

	Engine getEngin() const;
	const Tire* getTire(int i)const;
	string getBrand() const;
	string getVersion() const;
	int getPrice() const;
	int getMiles() const;
	string description() const;
private:
	Engine engine;
	Tire tires[4];
	string brand;//版本
	string version;//型号
	int price;
	int miles;//行驶里程数

};

Car.cpp

#include "Car.h"

Car::~Car()
{
	cout << "_FUNCITON_" << endl;
}

Car::Car(const string& carBrand, const string& carVer, int carPrice, 
	const string& engineBrand,float engineVer, 
	const string& tireBrand)
	:engine(engineBrand,engineVer),
	tires{tireBrand,tireBrand,tireBrand,tireBrand}
{
	this->brand = carBrand;
	this->price = carPrice;
	this->version = carVer;
	this->miles = 0;
}

Engine Car::getEngin() const
{
	return engine;
}

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

string Car::getBrand() const
{
	return brand;
}

string Car::getVersion() const
{
	return version;
}

int Car::getPrice() const
{
	return price;
}

int Car::getMiles() const
{
	return miles;
}

string Car::description() const
{
	stringstream ret;

	ret << "汽车品牌:" << brand << "-" << version << "-$" << price
		<< "/t/t引擎:" << engine.description()
		<< "\t\t轮胎:" << tires[0].description();

	return ret.str();
}

Engine.h

#pragma once
#include <string>
#include <iostream>

using namespace std;

class Engine
{
public:
	Engine(const string& brand, float version);
	~Engine();

	string description() const;

private:
	string brand;//发动机品牌
	float version;//发动机型号：x.x升

};

Engine.cpp

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


Engine::Engine(const string& brand, float version)
{
	this->brand = brand;
	this->version = version;
}

Engine::~Engine()
{
	cout << "_FUNCITON_" << endl;
}

string Engine::description() const
{
	stringstream ret;
	ret << "品牌:" << brand << "，型号:" << version;
	return ret.str();
}

Tire.h

#pragma once
#include <string>
#include <iostream>

using namespace std;

class Tire
{
public:
	Tire(const string& brand="米其林");
	~Tire();

	string getBrand() const;
	float getPressure() const;
	string description() const;

private:
	string brand;//品牌
	float pressure;//胎压

};

Tire.cpp

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

Tire::Tire(const string& brand)
{
	this->brand = brand;
	this->pressure = 2.5;
}

Tire::~Tire()
{
	cout << "_FUNCITON_" << endl;
}

string Tire::getBrand() const
{
	return brand;
}

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

string Tire::description() const
{
	stringstream ret;
	ret << "品牌:" << brand << "胎压:" << pressure;
	return ret.str();
}

main.cpp

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

int main(void)
{
	{
		Car car("宝马", "x7", 950000, "宝马", 3.5);

		cout << car.description() << endl;

	};

	system("pause");
	return 0;

}