#include <iostream>
    #include <cstdlib>
    using namespace std;
    class OperatorX 
    {
        public:
        void* operator new(size_t sz) throw (const char*)
        {
            void* ptr1 = malloc(sz);
            if (ptr1 == 0) 
                throw "malloc() failed";
            return ptr1;
        }
        void operator delete(void* ptr1) 
        {
            cout << "Operator X :: delete(void*)" << endl;
            free(ptr1);
        } 
    };
    class OperatorY 
    {
        int filler[150];
        public:
        void operator delete(void* ptr1, size_t sz) throw (const char*)
        {
            cout << "Freeing " << sz << " bytes" << endl;
            free(ptr1);
        };
    };
    int main() 
    {
        OperatorX* ptr1 = new OperatorX;
        delete ptr1;
        OperatorY* ptr2 = new OperatorY;
        delete ptr2;
    }