Initializing Deck of Cards C++

I am working on a program in C++ but struggling a bit. Right now I have:

All needed #includes

enum Suit {SPADES=0, HEARTS=1, DIAMONDS=2, CLUBS=3}
typedef struct Card {
  Suit suit;
  int value;
} Card;

int main() {

Card deck[52];

int cardNum = 52;
int suitNum = 4;
int faceNum = 13;

for (int i = 0; i < suitNum; i++) {
  for (int j = 0; j < faceNum; j++) {
    deck[cardNum].suit = suitNum[i];
    deck[cardNum].value = faceNum[j];
    cardNum--;
  }
}

Obviously, this is incorrect. I am struggling to come up with the correct initialization here, and I have been working on this for a while. Any help would be appreciated.