allocate memory and set it ot a value c++ 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: c++ delete dynamically allocated array

int length = 69;
int * numbers = new int[length];
delete[] numbers;