Ever wondered what all the operators that you can use = are. Like ^=. Or what about operator precedence? Does * come before ++? (Answer no, ++ is higher precedence than *).

Do you know how

a & b == 7

is parsed? It’s actually a & (b==7)

This Wikipedia page lists all the operators with precedence order and as it includes C++, it lets you see what you can and can’t do in C and C++.  It’s worth bookmarking whenever you need to look these things up.