ex3_1a.cpp

// use `using` for 1.4.1

#include <iostream>

using std::cin;
using std::cout;
using std::endl;

int main()
{
    int sum = 0;
    for (int val = 1; val <= 10; ++val) sum += val;
    cout << "Sum of 1 to 10 inclusive is " << sum << endl;

    return 0;
}