/******************************************************************************
Welcome to code of Lập trình - Điện tử
Series: C++
Author: Nghĩa Taarabt
*******************************************************************************/
#include <iostream>
using namespace std;
int main()
{
int number;
int sum = 0;
while (true)
{
cout << "Enter a number: ";
cin >> number;
if (number < 0)
{
break;
}
// add all positive numbers
sum += number;
}
cout << "The sum is " << sum << endl;
return 0;
}