opertor new

The new operator does both the allocation and the initialization, where as the operator new only does the allocation.

class car {     string name;     int num;       public:           car(string a, int n)         {             cout << "Constructor called" << endl;             this->name = a;             this->num = n;         }                            void *operator new(size_t size)         {             cout << "new operator overloaded" << endl;             void *p = malloc(size);             return p;         }           void operator delete(void *ptr)         {             cout << "delete operator overloaded" << endl;             free(ptr);         } };   int main() {     car *p = new car("HYUNDAI", 2012);     delete p; }

• It is the mechanism of overriding the default heap allocation logic.
• It doesn’t initializes the memory i.e constructor is not called. However, after our overloaded new returns, the compiler then automatically calls the constructor also as applicable.