import Foundation
/*
A standard deck of 52 playing cards consists of four suits:
spades (♠), hearts (♥), diamonds (♦), and clubs (♣).
Each suit contains 13 ranks:
Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King.
Cards of spades and clubs are black, while hearts and diamonds are red.
Color is informational only — it does not affect shuffling or random selection.
*/
/*
This program performs multiple draws of 5 random cards from a 52‑card deck
WITHOUT duplicates across draws.
It uses:
- Array<String> for the deck
- shuffle() for efficient randomization (Fisher–Yates internally)
- functions for clean structure
Algorithm:
1. Build a full deck (52 cards)
2. For each draw:
a. Shuffle the remaining deck
b. Draw 5 cards
c. Remove them from the deck
*/
func buildDeck() -> [String] {
let ranks = ["2","3","4","5","6","7","8","9","10","J","Q","K","A"]
let suits = ["Clubs", "Diamonds", "Hearts", "Spades"]
var deck: [String] = []
for suit in suits {
for rank in ranks {
deck.append("\(rank) of \(suit)")
}
}
return deck
}
func drawFive(deck: inout [String], drawNumber: Int) {
// Shuffle the remaining deck before this draw
deck.shuffle()
print("Draw #\(drawNumber):")
for card in deck.prefix(5) {
print(" \(card)")
}
print()
// Remove drawn cards
deck.removeFirst(5)
}
func main() {
// Number of draws
let numberOfDraws = 3
var deck = buildDeck()
// Perform multiple draws (no duplicates)
for drawIndex in 1...numberOfDraws {
if deck.count < 5 {
print("Not enough cards left for draw #\(drawIndex).")
break
}
drawFive(deck: &deck, drawNumber: drawIndex)
}
}
main()
/*
run:
Draw #1:
8 of Hearts
8 of Clubs
2 of Hearts
7 of Hearts
6 of Spades
Draw #2:
9 of Hearts
6 of Hearts
9 of Spades
5 of Hearts
Q of Diamonds
Draw #3:
J of Hearts
10 of Diamonds
3 of Diamonds
9 of Clubs
9 of Diamonds
*/
