// check_it.cpp -- checking for valid input
#include <iostream>

int main()
{
    using namespace std;
    cout << "Enter numbers: ";

    int sum = 0;
    int input;
    while (cin >> input)
    {
        sum += input;
    }

    cout << "Last value entered = " << input << endl;
    cout << "Sum = " << sum << endl;
/* keeping output window open */
/*
    cin.clear();
    while (cin.get() != '\n')
        continue;
    cin.get();
*/
    return 0;
}