Using delete 

There are two syntactic variants for the delete operator: one for single objects and the other for arrays of objects. The following code fragment shows how these differ:

// expre_Using_delete.cpp
struct UDType 
{
};

int main()
{
   // Allocate a user-defined object, UDObject, and an object
   //  of type double on the free store using the
   //  new operator.
   UDType *UDObject = new UDType;
   double *dObject = new double;
   // Delete the two objects.
   delete UDObject;
   delete dObject; 
   // Allocate an array of user-defined objects on the
   // free store using the new operator.
   UDType (*UDArr)[7] = new UDType[5][7];
   // Use the array syntax to delete the array of objects.
   delete [] UDArr;
}

The following two cases produce undefined results: using the array form of delete (delete [ ]) on an object and using the nonarray form of delete on an array.

See Also

Reference

Expressions with Unary Operators