How does the line imply?(below) How tto iinout susuch way? Is it by using EOF? how?

Question

"first line of the input is an integer t (t<15) which denotes how many sets of inputs are there. Each of the next t lines contain two integers a and b(|a|,|b|<1000000001)"

Answer 1

cin >> t;
for (int i=0; i<t; i++){
cin >> a >> b;
dosomething();
}