if i do a friend Testclass operator +(Test class &obj2); it is not correct because i need two obj

[John Cho]

if i do a friend Testclass operator +(Test class &obj2); it is not
correct because i need two objects?

 

[Jonathan Turkanis]

if i do a friend Testclass operator +(Test class &obj2); it is not
correct because i need two objects?

It depends what you want to do. If you declare operator+ as above, you
get a unary operator+ which might be used like this, for example (for
illustration, I'm assuming you also have a binary operator*):

Test a, b, c;
c = +b * a

If you want to be able to write

c = a + b

you need to define a binary operator+, which you might declare as
follows:

Test operator+(const Test&, const Test&);

Jonathan