// AddWhilePositive.cc
// Computes the sum of numbers input at the keyboard.
// The input is terminated when input number is negative.

#include <iostream>
using namespace std;

int main()
{
   float number, total=0.0;
   
   cout << "Input numbers to be added: " << endl;
   cin >> number;

   // Stay in loop while input number is positive
   while(number >= 0.0)
   {
       total = total + number;
       cin >> number;
   }

   // Output sum of numbers
   cout << total << endl;
   return 0;
}