Easy question: Keep creating objects

I named the start of the topic with "Easy question" because this sould be answered by only 1 or 2 members, so that you could concentrate on other more important problems.

So, the user enters some numbers, which will be the elements of a vector from a class. I want that whenever the user finishes entering them (by pressing Enter), a new object to be created. So if I am entering:

1 3 4 4 21 3
1 2 -1 88 9 23
42 9 8 4

there should be 3 objects created with those numbers. How can I dynamically create objects and still be able to access them after?

It isn't very difficult

You get input from console, and when six are counted, you allocate the object

Quote:

---

Originally Posted by Veneficvs

How can I dynamically create objects and still be able to access them after?

---

Not sure what you mean by that. You can access them just as you would access a static object ( almost the same way )

I suggest the use of std::getline() to read the line into a std::string, then you make use of a stringstream to extract the numbers from that line into the given member vector.

You presumably want a vector of these objects.

Yeah, i didn't notice that not all of them are six!! :D
I suppose the way laserlight suggests if much better...

is much better... :D

I am afraid I am unable to put this in an understandable way.. I will give some examples here.
When you declare a CBox object, for example, you write:
CBox abox; or CBox *abox = new CBox;
But as you see, I have declared names for them.

When I enter 1 2 3 4 56 7, a CBox object has to be created. When I enter other series of numbers, another one has to be created. And so on. I cannot refer to those object..

I could create a vector of CBox classes.. and whenever a new series of numbers is entered, to resize the vector so that it could contain as many objects as entered.. but if I declare it as static, then I could not make it have another dimension.. and if I make it dynamically and then readjust its dimension, would not I lose the data so far?

I am making a little project by myself, just to practice my skills, but still, I am a memory-saving paranoic one. And I want to become more skilled in dynamically allocation as well.

Quote:

---

Originally Posted by Veneficvs

I could create a vector of CBox classes.. and whenever a new series of numbers is entered, to resize the vector so that it could contain as many objects as entered.. but if I declare it as static, then I could not make it have another dimension.. and if I make it dynamically and then readjust its dimension, would not I lose the data so far?

---

As you stated, each object as a vector. This does not conflict with the idea of having a vector of these objects:

Code:

---

#include <istream>
#include <vector>
#include <string>
#include <sstream>

class Box
{
public:
    // ...

    friend std::istream& operator>>(std::istream& in, Box& box);
private:
    std::vector<int> numbers;
};

int main()
{
    std::vector<Box> boxes;
    // ...
    return 0;
}

std::istream& operator>>(std::istream& in, Box& box)
{
    // Read a line from in into a std::string.
    // Initialise a std::stringstream with that std::string.
    // Extract from the std::stringstream into box.numbers.
    // ...
    return in;
}

---

Thank you very much ! I will try it tonight and tell you if it worked.

I made the vector of boxes statically in the end. I am afraid I would like a complete representation of that >> overloading, please.

Quote:

---

I named the start of the topic with "Easy question" because this sould be answered by only 1 or 2 members,

---

Quote:

---

I made the vector of boxes statically in the end. I am afraid I would like a complete representation of that >> overloading, please.

---

I suggest you put forth some effort and show some code. Laserlight has been gracious enough to show you code, more than I would have given your original vague post, so do some research on your own and figure it out.