Is this C++ structure initialization trick safe?

Question

Instead of having to remember to initialize a simple \'C\' structure, I might derive from it and zero it in the constructor like this:

struct MY_STRUCT
{
            


        

Answer 1

Try this - overload new.

EDIT: I should add - This is safe because the memory is zeroed before any constructors are called. Big flaw - only works if object is dynamically allocated.

struct MY_STRUCT
{
    int n1;
    int n2;
};

class CMyStruct : public MY_STRUCT
{
public:
    CMyStruct()
    {
        // whatever
    }
    void* new(size_t size)
    {
        // dangerous
        return memset(malloc(size),0,size);
        // better
        if (void *p = malloc(size))
        {
            return (memset(p, 0, size));
        }
        else
        {
            throw bad_alloc();
        }
    }
    void delete(void *p, size_t size)
    {
        free(p);
    }

};