create dynamic array in cpp code example
Example 1: declare dynamic array c++
int main()
{
int size;
std::cin >> size;
int *array = new int[size];
delete [] array;
return 0;
}
Example 2: dynamic array cpp
#include <iostream>
#include <cstddef> // std::size_t
int main()
{
std::cout << "Enter a positive integer: ";
std::size_t length{};
std::cin >> length;
int *array{ new int[length]{} }; // use array new. Note that length does not need to be constant!
std::cout << "I just allocated an array of integers of length " << length << '\n';
array[0] = 5; // set element 0 to value 5
delete[] array; // use array delete to deallocate array
// we don't need to set array to nullptr/0 here because it's going to go out of scope immediately after this anyway
return 0;
}