error LNK2001: unresolved external symbol "public: __thiscall Book::~Book(void)"
/*三、以下是图书类book的定义，但没有类的实现部分的代码，请根据类的定义编写类的实现部分的代码，并编写响应的程序对所定义的类进行测试。 Class book { char *name; //书名 Char *author; //作者 Int sale; //销售量 Public Book( ); //无参构造函数 Book(char,char,int); //有参构造函数 Void disp( ) //输出数据 ~book( ); //析构函数 ｝*/#include<iostream>#include<string.h>using namespace std;class Book{public: Book(){name="c_plus_plus",author="T_H_Q",sale=60000;}; Book(string name1,string author1,int sale1):name(name1), author(author1),sale(sale1){;}; string get_name(){return name;}; string get_author(){return author;}; int get_sale(){return sale;}; void display(); ~Book();private: string name; string author; int sale; };void Book::display(){ cout <<"name:";get_name();cout <<"\n"; cout <<"author:";get_author();cout <<"\n"; cout <<"sales:";get_sale();cout<<"\n";};int main(){ Book book1; Book book2("math","H_S_Q",70000); book1.display(); book2.display(); return 0;}