You're kidding, right?
I've used these for as long i can remember. one of the first things one learns when studying the C language.
while (x-->0) and while (x++<10)
Their names:
" --> " and " ++< " don't not HAVE names since they're NOT single operators, it's simply the decrement/increment operator, followed by a comparison operator. So it is 2 operators, not one.
FIY: it's not just C++ but used in many languages, for example java.