// $ g++ -o raii raii.cpp
// https://en.wikipedia.org/wiki/Resource_acquisition_is_initialization
#include <cstdio>
class MyClass {
    int *n;
    public:
        MyClass(int x)
        {
            this->n = new int[x];
            printf("constructor\n");
        }
        ~MyClass()
        {
            delete this->n;
            printf("deconstructor\n");
        }
        int* get_n()
        {
            return this->n;
        }
};

int main()
{
    MyClass *b = new MyClass(5);
    int *xs = b->get_n();
    printf("%d\n", xs[0]);
    delete b;
    printf("%d\n", xs[0]);
}