// hearts.cpp
//
// A program that simulates some aspects of the game "Hearts".
//
// Elizabeth Sklar
// August 2007

// include C and C++ headers

#include <stdlib.h>
#include <time.h>
#include <iostream>
using namespace std;

// define constants for suits
const int DIAMONDS = 0;
const int CLUBS    = 1;
const int HEARTS   = 2;
const int SPADES   = 3;

// define constants for face characters, such that:
//  0 is '2', 1 is '3', ... , 8 is ten ('T'), 9 is jack ('J'), 
// 10 is queen ('Q'), 11 is king ('K'), 12 is ace ('A')
//                    0123456789012
const string FACES = "23456789TJQKA";


/**
 * dealHand()
 * this function emulates dealing "numcards" from a deck.
 * it stores the cards in the "cards" array.
 * it ensures that there are no duplicates in the "cards" array.
 */
void dealHand( int numcards, int cards[] ) {
  bool picked[52]; // flags indicating if a card value has been picked or not
  int newcard; // value of new card 
  srand( time( NULL )); // initialize random number seed
  for ( int i=0; i<52; i++ ) { // initialize "picked" flags
    picked[i] = false;
  }
  for ( int i=0; i<numcards; i++ ) { // pick "numcards" unique cards
    newcard = rand() % 52; // find a card that hasn't been picked yet
    while ( picked[newcard] ) {
      newcard = rand() % 52;
    }
    cards[i] = newcard; // select the unpicked card
    picked[newcard] = true; // set flag indicating the card has been picked
    cout << "value of card[" << i << "] = " << cards[i] << endl;
  }
} // end of dealHand()


/**
 * showCard()
 * this function displays the face character and suit name of the
 * "card" argument. for example, if "card" is 0, then this function
 * will output "2 of diamonds".
 */
void showCard( int card ) {
  // YOU NEED TO WRITE THE CODE FOR THIS FUNCTION
} // end of showCard()


/**
 * showHand() 
 * this function displays the face character and suit name of each
 * entry in the "cards" array. "numcards" is the number of entries in
 * this array.  HINT: call the function "showCard()", which you have
 * defined above, to display the face character and suit name of
 * individual entries.
 */
void showHand( int numcards, int cards[] ) {
  // YOU NEED TO WRITE THE CODE FOR THIS FUNCTION
} // end of showHand()

/**
 * countPoints()
 * this function will count and return the number of points in the
 * hand represented by the "cards" argument. "numcards" is the number
 * of entries in this array.  points are allocated as follows: the
 * queen of spades (value 43) is worth -26 points. all hearts are
 * worth 1 point. cards of all other suits are worth 0.
 */
int countPoints( int numcards, int cards[] ) {
  // YOU NEED TO WRITE THE CODE FOR THIS FUNCTION
} // end of countPoints()


/**
 * change3cards()
 * This function will select 3 entries in the "cards" argument that
 * should be changed. "numcards" is the number of entries in this
 * array. The "change" argument is an array of size 3.  First, the
 * function should look for the queen of spades (value=43) in the
 * "cards" array. If it finds it, then it should put its value in the
 * "change" array, and replace its entry in the "cards" array with -1.
 * Second, the function should find the 2 or 3 largest values in the
 * "cards" array, place these values in the "change" array and place
 * -1 in each entry in the "cards" array that is selected.  Note that
 * we say "2 or 3 values" above because if the queen of spades is
 * found, then you only need to find the 2 largest values; otherwise
 * you need to find the 3 largest values.
 */
void change3cards( int numcards, int cards[], int change[] ) {
  // YOU NEED TO WRITE THE CODE FOR THIS FUNCTION
} // end of change3cards()


/**
 * main()
 * This is the main function of the program. Inside, you should write code to:
 * 1. declare an array of 13 integers that will store an array of cards that 
 *    represents your "hand" in the game
 * 2. call the function dealHand() to initialize your array ("hand")
 * 3. call the function showHand() to display the contents of your hand
 * 4. call countPoints() to calculate the point value of the cards in your 
 *    hand, and then display that value
 * 5. call change3cards() to select 3 cards to change from your hand,
 *    and then display those 3 cards
 */
int main() {
  // YOU NEED TO WRITE THE CODE FOR THIS FUNCTION
} // end of main()