Overloading + operator that can't be member nor friend??

**p0gig** · 03-13-2004

4) Addition – To add two quaternions you have to add the corresponding components. Thus (1.1, 2.2, 3.3, 4.4) + ( 1, -1.2, 4.4, 10) = (2.1, 1, 7.7, 14.4).
Implement both the += operator and the binary + operator. The += should be a member function. The operator+ function can’t be a member or a friend function.

okay well i'm still pretty newbie to this whole c++ thing, but i've made a class for the quaternions, and i just simply don't know how to overload the + operator without making it a member or a friend..how would i access the private members of the class if it's neither of those???

assignment due soon so any help or just anything to get me started would be great, - thanks

**alphaoide** · 03-13-2004

>> how would i access the private members of the class if it's neither of those???

You could create accessor member functions to get private member data of a class

Code:

class myClass
{
public:
    myClass();
    ~myClass();
    int getData();
private:
    int data;
};

myClass::myClass{}
myClass::~myClass{}
int myClass::getData{ return data }

**CornedBee** · 03-14-2004

Overload += first, then do this:

Code:

quaternion operator+(const quaternion &lhs, const quaternion &rhs)
{
  quaternion temp(lhs);
  temp += rhs;
  return temp;
}

That's the most common way to overload +.

**p0gig** · 03-14-2004

thank you so much, you guys are a life saver ^^

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