e-5-2.txt

最后声明

#include<iostream>
using namespace std;
class Product{
private:
	char *name;
	int price;
	int quantity;
public:
	Product(char *a,int b,int c);
	void purchase(int money);
	void remain();
	~Product();
};
Product::Product(char *a, int b, int c){
	name=a;
	price=b;
	quantity=c;
	cout<<"name:"<<a<<endl;
	cout<<"price:"<<b<<endl;
	cout<<"quantity:"<<c<<endl;
}
void Product::purchase(int money){
	quantity=quantity-money/price;
}
void Product::remain(){
	cout<<"Now,quantity:"<<quantity<<endl;
}
Product::~Product(){
	cout<<"Now,quantity:"<<quantity<<endl;
}
void main(){
	Product p("beef",8,100);
	p.purchase(64);
	p.remain();
	system("pause");
}