Class of dynamic array

Asked Jun 09 '14 at 09:03

Active Jun 09 '14 at 09:19

Viewed 72 times

I've been working on a C++ exercise and I was unable to figure out how to do it correctly, let me explain it:

I made this class based on the 1st question of the exercise

class cylinder
{
private:
    float height;
    float radius;
    char * label;
public:
    cylinder(float, float, char *);
    cylinder();
    cylinder(const cylinder &);
    ~cylinder();
};

The 2nd question was:

Create a new class "form3D" contain cylinders (dynamic array of cylinder)

How to make a default constructor & constructor with parameters?

This is what I did:

class forme3d
{
    cylinder * tab;
    int tabsize;
public:
    forme3d();
    forme3d(cylinder * , int);
    ~forme3d();
};

forme3d::forme3d(cylindre * c, int t)
{
    cylindre * tab = new cylindre[t];
    for (int i = 0; i < t; ++i)
    {
        tab[i] = c[i];
    }
}

This cause an error about "operator=" not defined for this line "tab[i] = c[i];"

edited Jun 09 '14 at 09:19

Mark

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asked Jun 09 '14 at 09:03

user3721669

1

http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three – πάντα ῥεῖ Jun 09 '14 at 09:04
Please shoe how do you call this function and with what args. – 4pie0 Jun 09 '14 at 09:04
Tried that and still didnt works, maybe I did it wrong – user3721669 Jun 09 '14 at 09:16
1

He means that because you defined the copy constructor (and a destructor) then you will not get an automatically generated assignment operator. You will need to manually write one. – Dennis Jun 09 '14 at 09:27
1

Use `std::string`. Trust me, you'd learn to appreciate everyone who ever drove you away from raw null-terminated char arrays. – StoryTeller - Unslander Monica Jun 09 '14 at 09:33
In addition to `std::string`, you may use `std::vector`. – Jarod42 Jun 09 '14 at 09:59

Class of dynamic array

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