1#include <iostream>
2#include <cstddef> // std::size_t
3
4int main()
5{
6 std::cout << "Enter a positive integer: ";
7 std::size_t length{};
8 std::cin >> length;
9
10 int *array{ new int[length]{} }; // use array new. Note that length does not need to be constant!
11
12 std::cout << "I just allocated an array of integers of length " << length << '\n';
13
14 array[0] = 5; // set element 0 to value 5
15
16 delete[] array; // use array delete to deallocate array
17
18 // we don't need to set array to nullptr/0 here because it's going to go out of scope immediately after this anyway
19
20 return 0;
21}