operators - Difference between += and =+ in C++

Question

While programming in C++, I often confuse both "+=" and "=+", the former being the operator I actually mean. Visual Studio seems to accept both, yet they behave differently and is a source for a lot of my bugs. I know that a += b is semantically equivalent to a = a+b, but what does "=+" do?

Answer 1

=+ is really = + (assignment and the unary + operators).

In order to help you remember +=, remember that it does addition first, then assignment. Of course that depends on the actual implementation, but it should be for the primitives.