Re: what is the difference between new and opeartor new.

Can any please let me know the difference between new and operator
new. i have written follwoing example in which i have overloaded new
operator.
When i am using "void *p = operator new(1);" it doesn't call the new
overloaded operator. So waht is operator new.When we use it?
#include <iostream>

#include <cstdlib>

#include <new>

using namespace std;

class MyClass {

  int x, y;

public:

  MyClass() {

     x = y = 0;

  }

  MyClass(int lg, int lt) {

          std::cout << "in a constructor";
          x = lg;

    y = lt;
  }

  void show() {

    cout << x << " ";

    cout << y << endl;

  }

  void *operator new(size_t size);

  void operator delete(void *p);

  void *operator new[](size_t size);

  void operator delete[](void *p);

};

// overloaded new operator
void *MyClass::operator new(size_t size)
{
  std::cout << "in a operator new";
        void *p;

  cout << "In overloaded new.\n";

  p = malloc(size);

  if(!p) {

    bad_alloc ba;

    throw ba;
  }
  return p;

}

// delete operator overloaded
void MyClass::operator delete(void *p)
{

  cout << "In overloaded delete.\n";

  free(p);

}

// new operator overloaded for arrays.
void *MyClass::operator new[](size_t size)
{
  void *p;

  cout << "Using overload new[].\n";

  p = malloc(size);

  if( !p ) {

    bad_alloc ba;

    throw ba;
  }

  return p;

}

// delete operator overloaded for arrays.
void MyClass::operator delete[](void *p)
{
  cout << "Freeing array using overloaded delete[]\n";

  free(p);

}

int main()
{
  MyClass *objectPointer1, *objectPointer2;

  int i;
  void *p = operator new(1);

  try {

    objectPointer1 = new MyClass (10, 20);

  } catch (bad_alloc xa) {

    cout << "Allocation error for objectPointer1.\n";

    return 1;;
  }

  try {

    objectPointer2 = new MyClass [10]; =

array

  } catch (bad_alloc xa) {

    cout << "Allocation error for objectPointer2.\n";

    return 1;;
  }

  objectPointer1->show();

  for( i = 0; i < 10; i++)
    objectPointer2[i].show();

  delete objectPointer1; =

  delete [] objectPointer2; =

  int ruk;
  std::cin >> ruk;

  return 0;

}