【31】C++项目练习

定义一个类Book, 用来描述新书, 具有以下功能:
查看当前价格.

查看当前的书号

定义一个类SellBook, 用来表示促销的书籍, 要求继承自Book类

具有以下功能:

1. 查看当前折扣
2. 设置当前折扣

查看当前的促销价格

下面是我自编的代码

Book类

 .h

#pragma once
#include <string>

using namespace std;

class Book
{
public:
	Book();
	~Book();

	int getPrice();
	string getIsbn();

protected:
	int price;
	string isbn;
};

.cpp

#include "Book.h"

Book::Book()
{
}

Book::~Book()
{
}

int Book::getPrice()
{
    return price;
}

string Book::getIsbn()
{
    return isbn;
}

ShellBook类

.h

#pragma once
#include "Book.h"

using namespace std;

class Shellbook :
    public Book
{
public:
    Shellbook(int price, string isbn, float discout);

    float getDiscout();
    float setDiscout(float discout);
    int getPrice();

private:
    float discout = 1.0;
};

.cpp

#include "Shellbook.h"

Shellbook::Shellbook(int price, string isbn, float discout)
{
	this->price = price;
	this->isbn = isbn;
	this->discout = discout;
}

float Shellbook::getDiscout()
{
	return discout;
}

float Shellbook::setDiscout(float discout)
{
	return discout;
}

int Shellbook::getPrice()
{
	this->price = price * discout / 10;
	return price;
}

main

.cpp

#include "Book.h"
#include "Shellbook.h"
#include <iostream>

using namespace std;

int main(void) {
	Book book;
	Shellbook book1(98, "123456",5);

	cout << "价格：" << book1.getPrice() << " ISBN：" << book1.getIsbn() << endl;

	system("pause");
	return 0;

}