Hi all, I am trying very hard to learn to program and have been setting a lot of little challenges for myself to help me practice(its going pretty well). Anyway, when I hit a wall with something I don't know how to do yet that we haven't learned in class, I go online and look around. So far this forum has been a very helpful resource as there are a lot of people like me.
Anyway, my latest hurdle has been a sort of number-checker that makes sure my imaginary users enter numbers and not, you know, letters.
I found this piece of code on this forum:
cout << "Enter two integers: ";
int x = 0;
while(!(cin >> x))
cout << "Invalid input. Try again: ";
cout << "You enterd: " << x << endl;
And had no problems making it work. But the original thread it was in did not go into detail about exactly what is going on, here, and I have a little personal rule about not using code I can't understand(this seemed like a wise way to ensure I'm actually learning).
In particular, on this line:
why is there an ! after that first (? why is it (!(cin >> x)) and not just (cin >> x)?
Then on this line:
I know its clearing the value of x and preparing to ask the user to re-enter a value... but how exactly does IT know that? How does the code know its erasing x?
I am probably going to ask a lot of stupid questions here, but that's how we learn, right?