Thread: A homework problem about C++ (Pointer)

thanks all^^

So, Should I use this part to switch with my old

Code:

 
Integer& Interger::operator=( const Interger& rhInt)
{
         value = rhInt.value;
         return *this;
}

to that one

Code:

// call new before calling delete (safe for self assignment)
Integer& Integer::operator=( const Integer& rhInt ) {
// do not dereference a null pointer, consider a null pointer 
// to be a  deep copy of a null pointer.  
    int *new_int = rhInt.value?new(*(rhInt.value)):0;
    delete value;
    value = new_int;
    return *this;

but. what is it?

Code:

 
int *new_int = rhInt.value?new(*(rhInt.value)):0;