/*
 * Copyright 2011 Steven Gribble
 *
 *  This file is part of the UW CSE 333 course project sequence
 *  (333proj).
 *
 *  333proj is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  333proj is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with 333proj.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <iostream>  // for std::cout, std::cin, std::cerr
#include <cstdlib>   // for EXIT_SUCCESS
#include <cassert>   // for assert()
#include <string>    // for the string object

// lec 9 exercise 1
//
// Write a C++ program that uses streams to:
//  - prompt  the user to type in 5 floats
//  - print them out in opposite order with 4 digits of precision

using std::cout;
using std::cin;
using std::cerr;
using std::endl;
using std::string;

#define NUMFLOATS 5
int main(int argc, char **argv) {
  float input[NUMFLOATS];
  int i;

  cout << "Type in a whitespace-separated list of " << NUMFLOATS << " ";
  cout << "floats:" << endl;

  for (i = 0; i < NUMFLOATS; ++i) {
    // Try to read the next float from cin; we'll call cin's
    // good() method to make sure the input and float conversion
    // was successful.
    if (!((cin >> input[i]).good())) {
      cerr << "Failed to read float " << i << ":" << endl;

      // Did we fail because we hit the end of file?
      if (cin.eof()) {
        cerr << "  [hit EOF]" << endl;
        return EXIT_FAILURE;
      }

      // Help out the user by printing the offending input.
      string broken;
      cin.clear();
      cin >> broken;
      cerr << "  [" << broken << "]" << endl;
      return EXIT_FAILURE;
    }
  }

  // Print out the array, but reversed.
  for (i = NUMFLOATS-1; i > 0; --i) {
    cout << input[i] << " ";
  }
  cout << input[0] << endl;

  return EXIT_SUCCESS;  // defined in stdlib.h
}