What about #include <stdio.h> ?? And what is xp??

Answer 1

for c++ we use iostream instead of studio.h which is for c. and the xp is to level up your account, maybe later they'll reward people with high levels, or some courses will require higher xp, oh and when you challenge people you will most likely get someone close to your level

Answer 2

that's for C

Answer 3

thanks @imaqtpie

Answer 4

na stdio.h huh?
xp is window =,.=
I mean experience but Undertale tell me that it is "Execution point"...