#include <iostream.h>
#include <iomanip.h>
#include <limits.h> // for INT_MAX


int main () {

  double earned_income;
  int age, dependents;

  for (;;) {

    cout << endl << "Please enter earned income, age, and dependents"
         << endl << "(all zeroes to stop): ";
    cin >> earned_income >> age >> dependents;

    if (cin.fail()) {

      // the input operation failed altogether (the user did not enter
      // a valid double value followed by two int values).

      // begin by outputting an error message.
      cout << "Garbage input ignored." << endl;
      // now reset cin and discard the balance of the current input line
      // (clear the deck so that we can try again).
      cin.clear ();
      cin.ignore (INT_MAX, '\n');

    } else if ((earned_income == 0) && (age == 0) && (dependents == 0)) {

      return 0; // we're all done - go home

    } else if ((earned_income < 0) || (dependents < 0) || (age < 0)) {

      // the input values are unreasonable
      cout << "Unreasonable values ignored." << endl;

    } else {

      calculate_and_output_tax (earned_income, age, dependents);

    }

  } // end for (;;)

} // end main