【C++继承题目】商品类

Description

定义商品类(goods)，成员包括商品号,商品名. 成员函数包括构造函数,包括两个参数分别对成员进行赋值,display()用于显示成员的值.
定义商品类的子类食品类(foods),成员包括商品号,商品名,保质期(天数days),重写display()函数显示其所有成员值.

主函数如下:
int main()
{
 int ID;
 string name;
 int days;

 cin>>ID>>name;

 class goods goods1(ID,name);
 goods1.display();
 cout<<endl;
 cin>>ID>>name>>days;
 class foods foods1(ID,name,days);
 foods1.display();
 cout<<endl;

    return 0;
}

Input

录入商品对象的商品号，商品名

录入食品类的商品号，商品名，保质期

Output

输出商品对象的信息

输出食品对象的信息

Sample Input

1 clothes
2 bread 10

Sample Output

goodsID=1 goodsName=clothes
goodsID=2 goodsName=bread days=10

题解

#include<iostream>
using namespace std;
class goods
{
    public:
        goods(int id,string na):ID(id),name(na){}
        void display();
    protected:
        int ID;
        string name;        
};
class foods:public goods
{
    public:
        foods(int i,string n,int d):goods(i,n),days(d){}//在这调用基类的构造函数
        void display();
    private:
        int days; 
};
int main()
{
    int ID;
    string name;
    int days;
    cin>>ID>>name;
    class goods goods1(ID,name);
    goods1.display();
    cout<<endl;
    cin>>ID>>name>>days;
    class foods foods1(ID,name,days);
    foods1.display();
    cout<<endl;
    return 0;
}
void goods::display() 
{
    cout<<"goodsID="<<ID<<" "<<"goodsName="<<name<<endl; 
}
void foods::display() 
{
    cout<<"foodsID="<<ID<<" "<<"goodsName="<<name<<" days="<<days<<endl; 
}