#include <iostream>
#include <vector>
#include <string>
#include <random>
#include <algorithm> // shuffle
/*
A standard deck of 52 playing cards consists of four suits:
spades (♠), hearts (♥), diamonds (♦), and clubs (♣).
Each suit contains 13 ranks, which are Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, and 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:
- std::vector for the deck
- std::shuffle for efficient randomization
- std::mt19937 for high-quality randomness
*/
std::vector<std::string> buildDeck() {
// Ranks and suits of a standard deck
const std::vector<std::string> ranks = {
"2","3","4","5","6","7","8","9","10","J","Q","K","A"
};
const std::vector<std::string> suits = {
"Clubs", "Diamonds", "Hearts", "Spades"
};
std::vector<std::string> deck;
deck.reserve(52); // Efficient: avoid reallocations
// Build the deck: 13 ranks × 4 suits
for (const auto& suit : suits) {
for (const auto& rank : ranks) {
deck.push_back(rank + " of " + suit);
}
}
return deck;
}
int main() {
// Build the deck
std::vector<std::string> deck = buildDeck();
// Create a random engine using a non-deterministic seed
std::random_device rd;
std::mt19937 gen(rd());
// Shuffle the deck
std::shuffle(deck.begin(), deck.end(), gen);
// Draw the first 5 cards
std::cout << "Your 5 random cards:\n";
for (int i = 0; i < 5; ++i) {
std::cout << deck[i] << "\n";
}
}
/*
run:
Your 5 random cards:
4 of Clubs
A of Spades
A of Hearts
3 of Diamonds
A of Clubs
*/
