The primary function of a " Domain name server (DNS" is to translate the URL or web address a user enters in a web browser, into the correct corresponding IP address.
Packet loss is typically resolved by time-outs and retries. For applications where a duplicate operation doesn't matter this is acceptable.
You didn't specify what the program should output, so there are many possibilities that result in a working program. It *looks* like this was intended:
int x = 24;
int y;
y = x-12;
cout<<y<<endl;
and it will display 12.
Answer:
You should find a good game engine that is not hard. Unity and Unreal are some good ones.
You should also search for the programming language you like the most, and use engines that use that specific language.