#include <iostream>

#include <fstream>

// Sum the values the user enters

int main() {

int input = 0, sum = 0;

// Enable exceptions in the cin object

std::cin.exceptions(std::ifstream::badbit | std::ifstream::failbit);

std::cout << "Please enter integers to sum, 999 ends list: ";

while (input != 999) {

try {

std::cin >> input; // Watch for faulty (non-integer) input

if (input != 999)

sum += input; // Do not not include the terminating 999

}

catch (std::exception& e) {

std::cout << "****Non-integer input detected\n";

//cin.exceptions(std::ifstream::badbit | std::ifstream::failbit);

std::cin.clear(); // Clear I/O error

std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

//std::cout << e.what() << '\n';

}

}

std::cout << "Sum = " << sum << '\n';

}