/***************************************************
Maximum Number

Write a program that reads in positive integers from 
the user, each separated by a space, and the whole 
terminated by a negative number (e.g. 3 22 10 -2),
and returns the largest of the numbers entered (not
including the terminated negative number!).
***************************************************/
#include <iostream>
using namespace std;

int main()
{
  // initialization
  cout << "Enter numbers separated by spaces"
       << " and terminated with a negative number."
       << endl;
  int max_seen, k;
  cin >> k;
  max_seen = k;
  cin >> k;

  // Loop while the user enters more data
  while (k >= 0)
  {
    // check whether k is biggest so far
    if (k > max_seen)
      max_seen = k;
    
    // read next value
    cin >> k;
  }

  // write out result
  cout << "The largest number was " 
       << max_seen << endl;

 return 0;
}