如何用c＋＋设计一个产品类

Question

设计一个产品类，包括名称，单价，库存量等信息。利用静态数据成员存放产品的销售总额和销售量，并利用成员函数计算产品的销售总额和销售量

Answer 1

#include <iostream>
#include <string>

using namespace std;
class product
{
public:
    product(string _name,double _price,int _store)
    {
        name = _name;
        price = _price;
        store = _store;
        
        total_price += (_store*_price);
        total_store += (_store-1);//假设销售量是库存量-1
    }
public:
    static double get_total_price(){return total_price;}
    static int get_total_store(){return total_store;}
private:
    static double total_price;    //销售总额
    static int total_store;        //销售总量
private:
    string name;    //名称
    double price;    //单价
    int store;        //库存量
};

double product::total_price;    //销售总额
int product::total_store;        //销售量

int main() 
{
    product p1("p1",10,20);
    product p2("p2",20,30);
    product p3("p3",40,40);
    product p4("p4",80,50);
    cout<<product::get_total_price()<<endl;
    cout<<product::get_total_store()<<endl;
    return 0;
}