Question

I’m having an issue with two of my functions. I have an operator = method as well as an add method. They work fine on their own, as in I can only use one or the other during one compile. For example I need to comment out the add function in order for the operator = method to work and vice versa. The errors I’m getting 10 no match for 'operator=' in 'c = (&a)->HUGE_INT::add(((HUGE_INT&)(&b)))'

     HUGE_INT HUGE_INT::operator=(HUGE_INT &orig)
        {
        //code
         return *this;
        }

        HUGE_INT HUGE_INT::add(HUGE_INT &a)
        {
         //code
         return object;
        }

//client
    HUGE_INT a(9999999),b(1111),c,d;
       c = a.add(b);
       d = a;

Answer 1

The problem that you are having is that you are returning by value from add, and taking the argument to operator= by non-const reference.

The temporary object returned from add is an rvalue, and so it cannot be bound to a non-const reference.

Unless you are doing something very strange, you probably want to change operator= to take its argument by reference to const:

    HUGE_INT& HUGE_INT::operator=(HUGE_INT const& orig)
    {
    //code
     return *this;
    }

(I also changed it to return by reference, as this is the standard signature for operator=.)