Question

using c++ write a program that reads numbers from the user until the user enters a Sentinel. Use a Sentinel of -999. Ignore all negative numbers from the user input. Do the following:
1. Output the sum of all even numbers

Answer 1

#include <iostream>
using namespace std;

int main() {
    int num, sum = 0;
    while (true) {
        cout << "Enter a number: ";
        cin >> num;
        if(num == -999) break;
        if(num > 0 && num % 2 == 0) {
            sum += num;
        }
    }
    cout << "Sum of all even numbers is " << sum << endl;
    return 0;
}