/*
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 picks 5 random cards from a standard 52‑card deck.
It uses:
- List<String> to store ranks, suits, and the deck
- shuffled() for efficient randomization (Fisher–Yates internally)
- Functions for clean structure and idiomatic Kotlin
Algorithm:
1. Build the deck (52 strings).
2. Shuffle using shuffled().
3. Print the first 5 cards.
*/
fun buildDeck(): List<String> {
val ranks: List<String> = listOf("2","3","4","5","6","7","8","9","10","J","Q","K","A")
val suits: List<String> = listOf("Clubs", "Diamonds", "Hearts", "Spades")
// Combine each rank with each suit → 52 unique cards
return suits.flatMap { suit ->
ranks.map { rank -> "$rank of $suit" }
}
}
fun shuffleDeck(deck: List<String>): List<String> {
// Kotlin's shuffled() uses Fisher–Yates under the hood
return deck.shuffled()
}
fun main() {
// Step 1: Build the deck
val deck: List<String> = buildDeck()
// Step 2: Shuffle the deck
val shuffled: List<String> = shuffleDeck(deck)
// Step 3: Draw the first 5 cards
println("Your 5 random cards:")
shuffled.take(5).forEach { println(it) }
}
/*
run:
Your 5 random cards:
9 of Hearts
7 of Diamonds
4 of Spades
A of Clubs
6 of Diamonds
*/
