C++ | Operator Overloading | Question 10

Which of the following operator functions cannot be global, i.e., must be a member function.
(A) new
(B) delete
(C) Converstion Operator
(D) All of the above


Answer: (C)

Explanation: new and delete can be global, see following example.


#include
#include
#include

using namespace std;

class Myclass {
    int x;
public:
    friend void* operator new(size_t size);
    friend void operator delete(void*);
    Myclass(int i) {
        x = i;
        cout << "Constructor called \n";
    }
    ~Myclass() { cout << "Destructor called \n"; }
};


void* operator new(size_t size)
{
    void *storage = malloc(size);
    cout << "new called \n";
    return storage;
}

void operator delete(void *p )
{
    cout<<"delete called \n";
    free(p);
}

int main()
{
    Myclass *m = new Myclass(5);
    delete m;
    return 0;
}


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