RE: [Dev-C++] Help with creating objects dynamically

[Jaap de W. <wo...@ne...>]

Below is a piece of code what is creating named objects dynamicaly.
Is that what you mean?


> -----Original Message-----
> From: Satish Medepalli [mailto:sat...@ya...]
> Sent: Monday, July 21, 2003 6:28 AM
> To: dev...@li...
> Subject: [Dev-C++] Help with creating objects dynamically
> 
> 
> Hello,
> 
>    I have the following requirement while creating objects.. 
> I will try to
> explain it using a small example..
> 
>    Suppose I have a class Student defined and I want to 
> create objects of
> type Student inside the main function..
> 
>    And say, the actual name with which i want to create the obect is
> stored in a character array at run time.. say i have the following
> statement
> char NAME[]=getName();
> and the above function is returning the name "JOHN" at run time.
> 
>    Now i want to get the name out of the character array and 
> create the
> object using that particular name at run time.. i.e., 
> Student JOHN;  
> 
>    in a nutshell i want to give the name of the objects to be 
> created at
> run time. IS THIS POSSIBLE?? IF SO CAN ANYONE HELP ME WITH THIS??
> 
> Thank You in advance.
> -Sateesh Medepalli 
> 
=================================== start of code
===================================
#include <list>
#include <string>
#include <iostream>

class Object
{
public:
	std::string &GetName(){return m_name;}
	virtual std::string &GetFunction()=0;
protected:
	Object(const char *name):m_name(name){}
	Object(const Object &src):m_name(src.m_name){}
private:
	std::string m_name;
	friend std::ostream &operator <<(std::ostream &os, Object& ol);
};

class Student: public Object {
public:
	virtual std::string &GetFunction(){return m_function;}
	Student(const char *name):Object(name) {}
	Student(const Student& src):Object(src) {}
private:
	static std::string m_function;
};

class Teacher: public Object {
public:
	virtual std::string &GetFunction(){return m_function;}
	Teacher(const char *name):Object(name) {}
	Teacher(const Teacher& src):Object(src) {}
private:
	static std::string m_function;
};

std::string Student::m_function ("Student");
std::string Teacher::m_function ("Teacher");

class  ObjectList: public std::list<Object *>
{
public:
	~ObjectList();
};


ObjectList::~ObjectList()
{
	iterator i;
	for (i = begin(); i != end(); i++)
	{
		delete *i;
	}
}

std::ostream &operator <<(std::ostream &os, Object& ob)
{
	return os << ob.m_name << " (" << ob.GetFunction() << ")"; 
}

std::ostream &operator <<(std::ostream &os, ObjectList& ol)
{
	ObjectList::iterator i;
	for (i = ol.begin(); i != ol.end(); i++)
	{
		os << **i << std::endl;
	}
	return os;
}

void main()
{
	ObjectList AllPeople;
	AllPeople.push_back(new Student("Jan"));
	AllPeople.push_back(new Student("Piet"));
	AllPeople.push_back(new Student("Klaas"));
	AllPeople.push_back(new Teacher("Jan"));
	AllPeople.push_back(new Teacher("Mark"));
	std::cout << AllPeople;
}