#include <iostream>

int main()
{
   int i, largest;
   std::cout <<
      "Enter numbers, one per line (0 when finished) << std::endl;
   std::cin >> i;
   largest = i;
   while (i) {
      if (i > largest) largest = i;
      std::cin >> i;
      }
   std::cout << "The largest of these numbers is " <<
      largest << "." << std::endl;
   return 0;
}