Is it possible to allow a user to enter an array size with a keyboard?

Question

Is it possible to allow the user to enter the size of an array with a keyboard?

I know that arrays can\'t change size. The only solution I could think of is this:

Answer 1

No, arrays cannot be variably sized in C++. The code you have there will not compile, because the value of a constant has to be evaluated at compile-time.

You might try the std::vector class instead and use the resize method, or pass the size through the constructor. Although, depending on what you need, maybe you can just let it grow naturally by using push_back.

A lower-level alternative is to use dynamically allocated arrays:

int userSize;
cin >> userSize;
int* array = new int[userSize];