#ifndef BALZIP_H
#define BALZIP_H

// balzip.h  Interface file for the BALZip class

/*******************************************************************************
// MODULE NAME: BALZip
// INTERFACE FILE:      balzip.h
// IMPLEMENTATION FILE: balzip.cpp
//
// PURPOSE: To provide a BALZip type useful in an implementation of the BAL
// program that allows the user to create a new object, change the value of the
// zip code stored in the object, test the object to see if it contains a valid
// or default value, print the current or default contents of the object, and
// change the contents of the object to the default value
//
// FUNCTIONS:    Name            Purpose
//            BALZip            Parameterless Constructor
//            isValid           Test if it contains a valid zip code
//            isDefault         See if it contains the default value
//            Print             Print the current value of the object
//            Default           Print the default value of the object
//            Limits            Print the limits on the object
//            valueIs           Print the current value of the object
//            Store             Change the value to a new one
//            Reset             Change the value to the default
//
//  AUTHOR:  Amy Langill *2B  DATE: 3/20/1999
*******************************************************************************/

#include <cstdlib> // for isdigit
#include <string>  // for strings

using namespace std;

const int ZIP_WIDTH=5;            // Width of a zip field
const string DEFAULT_ZIP="99999"; // Default value
const char ZIP_STRING_FILLER=' '; // For formatting output
const int FIRST_DIGIT=0;          // 1st position in a zip code

class BALZip
{
public:
  // Constructors
  BALZip();

  // Observers
  bool isValid();
  bool isDefault();
  string valueIs();
  string Print();
  string Default();
  string Limits();

  // Transformers
  void Store(string newZip);
  void Reset();

private:
  string value;
};

#endif