#include "stdstuff.h"

// "customer" is the struct containing the customer information
// it is made up of id (an integer) and total (a double)
struct customer{
   int id;
   double total;
};

const int MAXCUST=100; // Hint: make MAXCUST much smaller to test filling the database

// customerDB is the customer database struct
struct customerDB{
   customer ci[MAXCUST]; // the array of customer information
   int numCusts; // the number of customers currently in the database
};

// Now your functions must have a customerDB struct as a parameter.  
// Hints:
// Do we pass structs by value or by reference?
// How do we indicate that the function doesn't change the customerDB struct?


// add a new customer to the database; returns true if successful, false otherwise
// (database full or customer already exists)
bool addCustomer(int id, double total, customerDB &db);
  
// remove a customer from the database; returns true if successful, false otherwise (customer
// does not exist)
bool removeCustomer(int id, customerDB &db);

// prints the full customer database (or a note if the database is empty)
// Customers are printed one per line, with 2 decimals for the total. 
void printCustomerDatabase(const customerDB &db);
     
// change the customer number of an existing customer; returns true if successful, 
// false otherwise (customer does not exist, or new customer id in use)
bool changeCustomerID(int id, int nid, customerDB &db);
     
// change the customer total of an existing customer; returns true if successful, 
// false otherwise (customer does not exist)
bool changeCustomerTotal(int id, double ntotal, customerDB &db);
     
// returns the highest total of all customers 
// (returns -1 if there are no customers in the database)
double getBestCustomerTotal(const customerDB &db);