# include <cstdlib>
# include <iostream>

using namespace std;

int main ( )
//
//  LUNCH.CPP demonstrates how a counter variable (in this case "DAY")
//  can be used to control how many times a WHILE loop is executed.
//
{
  int day;
  float lunch;
  float total;

  day = 0;
  total = 0.0;

  while ( day < 7 )
  {
//
//  Increase the loop counter.
//
    day = day + 1;

    cout << "Enter amount for lunch on day " << day << ":  ";
    cin >> lunch;
    total = total + lunch;
  }
  cout << "\n";
  cout << "This week's lunch bill: " << total << ".\n";

  return 0;
}