11. Dynamic memory allocation

#include "point.h"

int main()
{
    int* ptr_2_int = new int;
    int* ptr_2_array = new int[ 100 ];

    int size = 1000;
    Point* ptr_points = new Point[ size ];

    //...
    delete ptr_2_int;
    delete[] ptr_2_array;
    delete[] ptr_points;
    return 0;
}

new and delete are keywords

Remember to use delete[ ] for arrays!

When out of memory, new returns NULL.

If ptr is NULL,

    delete ptr;

is harmless.