Operator assignment overloading with dynamically allocated array

[eggsandbacon]

I'm writing a class that contains a array allocated dynamic of floats. I need to implement an assignment operator that is overloaded to assign the contents of one array to another.

Here's what I have so far (the class is called ArrayB):

ArrayB & operator= (const ArrayB & other)
{
if (this != &other)
{
//Logic goes here to assign arrays

}

return *this;
}
}

I'm having problems trying to figure out the logic and code to assign arrays to one another with dynamic allocation. Can someone help me out?

[Zhuge]

Dynamically allocate space for the copy then use a loop to copy each element from the other array.

[eggsandbacon]

Could you please show me an example of the code, specifically using the loop the copy the elements?

[Zhuge]

Why don't you try yourself first?

[eggsandbacon]

Here's what I tried:

ArrayB & operator= (const ArrayB & other)
{
if (this != &other)
{
delete [] arrayN;
elementsInArray = right.size();           //size() returns the size of the array
arrayN = new float[elementsInArray];
for (int 1= 0; i < elementsInArray; i++)
    arrayN[i] = right.arrayN[i];
    
return *this;
}


}

elementsInArray is defined in the private area in my class

[Cubbi]

Did you write the destructor and the copy constructor yet? If you did, the copy assignment is trivial:

ArrayB& operator=(ArrayB other)
{
    swap(arrayN, other.arrayN);
    swap(elementsInArray, other.elementsInArray);
    return *this;
}

[eggsandbacon]

No, I haven't. I thought that I needed to write the assignment operator first so that I could use it in the copy constructor. Is that not correct? Is it the opposite way around, I have to do the constructor first so I can use it in the assignment operator?

[ui uiho]

you need a destructor in c++ when doing this. also might i suggest vectors?