how should I set the constructor in order to inherit the base class?

Hi,

I had a base class and two derived classes. I don't know how to set the constructor of the 3rd class in order to inherit the base class and 2nd class data members - name, price and life.

I tried many but incurred many errors.

Any help?

Thanks a lot.

gogo

#ifndef PRODUCT_H
#define PRODUCT_H
#include <iostream>
#include <string>
using namespace std;

//--------Base Class--------------//

class Product
{
private:
string manufacturer;
char flag;
string date;

protected:
double price;
string name;
int life;

public:
Product();

Product(string na);

Product(string na, double pr);

Product(string na, double pr, int li);

virtual void display()=0;
};

//----------------- 1st level derived class----------------//

class Fruit:public Product
{
private:
string demand;
string supply;
double percent;

public:
Fruit(){}

Fruit(string na, double pr, int li):Product(na, pr, li){}

Fruit(string na, double pr, int li, string de, string su):Product(na, pr, li), demand(de), supply(su){}

double calpercent(string de, string su);

double pricechange();

void display();

};

//-------------------- 3rd level derived class----------------//

class Orange:public Fruit
{
public:
Orange(){} // ?? How should I set it here for the inheritance of the base class and 2nd class data members?

Orange(string de, double su){}

double calpercent(string de, string su);

double pricechange();

void display();

}

#endif

;:)

Sorry, I fixed my problem:

#ifndef PRODUCT_H
#define PRODUCT_H
#include <iostream>
#include <string>
using namespace std;

//--------Base Class--------------//

class Product
{
private:
string manufacturer;
char flag;
string date;

protected:
double price;
string name;
int life;

public:
Product();

Product(string na);

Product(string na, double pr);

Product(string na, double pr, int li);

//double pricechange();

virtual void display()=0;
};

//----------------- 1st level derived class----------------//

class Fruit:public Product
{
protected:
string demand;
string supply;
double percent;

public:
Fruit(){}

Fruit(string de, string su){}

Fruit(string de, string su, double per){}

Fruit(string na, double pr, int li):Product(na, pr, li){}

Fruit(string na, double pr, int li, string de, string su):Product(na, pr, li), demand(de), supply(su){}

double calpercent(string de, string su);

double pricechange();

void display();

};

//-------------------- 3rd level derived class----------------//

class Orange:public Fruit
{
public:
Orange(){}

Orange(string de, string su):Fruit(de, su){}

Orange(string na, double pr, int li):Fruit(na, pr, li){}

double calpercent(string de, string su);

double pricechange();

void display();

};




#endif