设计书类Book，成员函数包括作者（char author[40]），书名（char title[40]），价格（double price）。根据给定的main函数设计必要的成员函数。 main函数已给定，提交时只需要提交main函数外的代码部分。 #include<iostream> #include<cstring> #include<iomanip> using namespace std; //你提交的代码在这里 int main() { cout<<fixed<<setprecision(2); Book b1; cout<<"Show object b1:"; cout<<b1.GetTitle()<<"，"<<b1.GetAuthor()<<"，"<<b1.GetPrice()<<endl; char title[40],author[40]; double price; cin>>title>>author>>price; Book b2(title,author,price); cout<<"Show object b2:"; cout<<b2.GetTitle()<<"，"<<b2.GetAuthor()<<"，"<<b2.GetPrice()<<endl; cin>>title>>author>>price; cout<<"Reset and Show object b1:"; b1.Set(title,author,price); b1.Show(); cout<<"Reset and Show object b2:"; b2.Set(); b2.Show(); return 0; } 输入 2行，每行3个数据，分别代表一本书的书名、作者以及价格。 输出 按照样例输出格式输出。 输入样例 1 C++程序设计 郑莉 45.12 c++程序设计基础 王育坚 68.5 输出样例 1 Show object b1:NULL，NONE，0.00 Show object b2:C++程序设计，郑莉，45.12 Reset and Show object b1:c++程序设计基础，王育坚，68.50 Reset and Show object b2:高等数学（第七版）上册，同济大学数学系，37.70

#include <iostream>
#include <cstring>
#include <iomanip>
using namespace std;

class Book {
private:
    char author[40];
    char title[40];
    double price;
public:
    Book() {
        strcpy(this->author, "NONE");
        strcpy(this->title, "NULL");
        this->price = 0.00;
    }
    Book(char title[], char author[], double price) {
        strcpy(this->author, author);
        strcpy(this->title, title);
        this->price = price;
    }
    char* GetAuthor() { return this->author; }
    char* GetTitle() { return this->title; }
    double GetPrice() { return this->price; }
    void Set(char title[], char author[], double price) {
        strcpy(this->author, author);
        strcpy(this->title, title);
        this->price = price;
    }
    void Set() {
        char title[40], author[40];
        double price;
        cin >> title >> author >> price;
        Set(title, author, price);
    }
    void Show() {
        cout << this->title << "，" << this->author << "，" << fixed << setprecision(2) << this->price << endl;
    }
};

int main() {
    cout << fixed << setprecision(2);
    Book b1;
    cout << "Show object b1:";
    cout << b1.GetTitle() << "，" << b1.GetAuthor() << "，" << b1.GetPrice() << endl;
    char title[40], author[40];
    double price;
    cin >> title >> author >> price;
    Book b2(title, author, price);
    cout << "Show object b2:";
    cout << b2.GetTitle() << "，" << b2.GetAuthor() << "，" << b2.GetPrice() << endl;
    cin >> title >> author >> price;
    cout << "Reset and Show object b1:";
    b1.Set(title, author, price);
    b1.Show();
    cout << "Reset and Show object b2:";
    b2.Set();
    b2.Show();
    return 0;
}