Wrong C++ Challenge Question

Question

I keep flagging this question, but the developers don't do anything about it... It's absurd. The first option is also perfectly valid.

https://cernbox.cern.ch/s/eWuVNHfkKmQIPZy

Answer 1

@Mishu. The First option, is declaring an integer pointer

int* arr;

which, as you know, stores the address of an integer variable. The first option then assigns this integer pointer an address in memory somewhere on the heap.

int* arr = new int;

The value stored at that address in heap memory currently being stored by our integer pointer arr is 0, as you can see by the following line:

cout << *arr; //outputs 0

So this is perfectly valid. If you wanted to have the default value be something else, 5 for example, you would do:

int *arr = new int(5);

then:

cout << *arr; //outputs 5

I understand that the name of the variable, 'arr', inclines one to think that this pointer will store the heap address of the first element of a sequence of values, i.e., array, but still the question needs to be rephrased.

I hope I have effectively communicated why I think there is a problem with this question.

Answer 2

Regarding this comment:

Um isn't it from outer source, means out of Sololearn? Why have you posted? To share your feelings or just to inform us, or make a protest against it?

This is actually from a Sololearn challenge that I was doing on an Ipad. To preserve the privacy of the other player, I black the name out. Hopefully, this image shows that better:

https://cernbox.cern.ch/s/WQaPQVYSLcpcOkS

I made this post because I don't think it's right to have this question the way it is, especially on such a platform.

But I don't expect anything from making this post; it's not within my control. But any resolution would certainly be welcome.

Answer 3

Um isn't it from outer source, means out of Sololearn? Why have you posted? To share your feelings or just to inform us, or make a protest against it?

Answer 4

The First Option is not correct, because when you declare a new array type, you must declare its data holding capacity / size. So the second option is only correct. Don't flag it as incorrect.