BlackJack Game for my youngest brother lol

blackjack.c

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define SUIT_MAX_VAL 4
#define NUM_MAX_VAL 13
#define BLACK_JACK_NUM 21

char deck[4][13];

int randSuit() {
  srand(time(NULL));
  return rand() % SUIT_MAX_VAL;
}


int randCardNum() {
  srand(time(NULL));
  return rand() % NUM_MAX_VAL;
}

int cardInvalid(int suit, int cardNum) {
  if (deck[suit][cardNum] == 'x') {
    return 1;
  } else {
    deck[suit][cardNum] = 'x';
    return 0;
  }
}

const char * parseSuit(suitNum) {
  const char *suitStr;

  switch(suitNum) {
    case 0: suitStr = "Diamond"; break;
    case 1: suitStr = "Spades"; break;
    case 2: suitStr = "Clover"; break;
    case 3: suitStr = "Kamote"; break;
  }

  return suitStr;
}

int appendRandomCard(int total) {
  int suit, cardNum;

  do {
    suit = randSuit();
    cardNum = randCardNum();
  } while(cardInvalid(suit, cardNum));

  cardNum++;
  printf("Card: %d of %s\n", cardNum, parseSuit(suit));
  return cardNum;
}

int initializeCards(int total) {
  for (int x=0; x<2; x++) {
    total += appendRandomCard(total);
  }

  return total;
}

int chooseAgain() {
  char answer;
  printf("Pick a Card? [Y/N]");

  if (scanf(" %c", &answer) == 1 && answer == 'Y') {
    return 1;
  } else {
    return 0;
  }
}

int cardExceeded(int total) {
  if (total > BLACK_JACK_NUM) {
    return 1;
  } else {
    return 0;
  }
}

int userTurn(int total) {
  while (!cardExceeded(total) && chooseAgain()) {
    total += appendRandomCard(total);
    printf("\nYou now have a total of %d\n\n", total);
  };

 return total;
}

int dealerTurn(int dealerTotal, int userTotal) {
  while(!cardExceeded(dealerTotal) && (dealerTotal < userTotal)){
    dealerTotal += appendRandomCard(dealerTotal);
  }
  return dealerTotal;
}

int main(void) {
  int userTotal = 0, dealerTotal = 0;
  printf("----- Initializing --------\n");
  printf("User selects...\n");
  userTotal = initializeCards(userTotal);

  printf("\nDealer selects...\n");
  dealerTotal = initializeCards(dealerTotal);

  printf("\n\n========= User's Turn  =============\n");
  printf("Current User Total: %d\n", userTotal);
  userTotal = userTurn(userTotal);
  if (userTotal <= BLACK_JACK_NUM) {
    printf("\n\n\n\n======== Dealer's Turn ==========\n");
    printf("Current Dealer Total: %d\n", dealerTotal);
    dealerTotal = dealerTurn(dealerTotal, userTotal);
  }

  if ((dealerTotal > userTotal) && !(dealerTotal > BLACK_JACK_NUM)) {
    printf("\nDealer won!");
  } else {
    printf("\nUser won!");
  }

  printf("\n\nFinal score:\nUser = %d\nDealer = %d\n\n", userTotal, dealerTotal);
  printf("Thank you for playing Black Jack by Albert Ponce\n");
}