Hi, I can't figure out why it can't read in the number N... Can you please help?

Code:// Exercise 8 - Chapter 5 ("Programming: Principles and Practice using C++") #include "std_lib_facilities.h" class out_of_range_error{}; int main() try { vector <int> numbers; int num, N, sum; cout << "Enter some numbers (press '|' at prompt to stop):"; while (cin>>num) numbers.push_back(num); cout << "Enter how many of the first numbers you want to sum: \n";cin >> N; // PROBLEM HERE!!! - It cannot read in N!cout << "The sum of the first " << N << " numbers: "; sum = 0; for (int i=0; i<N; ++i) { sum += numbers[i]; cout << numbers[i] << ", "; if (i==(N-1)) cout << " and"; } cout << " is " << sum << endl; } catch (out_of_range_error) { cout << "Range error!\n"; return 1; } catch (...) { cerr << "Exception: Something went wrong\n"; return 2; }