#include <iostream>
#include <vector>
#include <string>
#include <random>
#include <algorithm>
/*
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:
- std::vector<std::string> for the deck
- std::shuffle for efficient randomization
- std::mt19937 for high‑quality randomness
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
*/
std::vector<std::string> buildDeck() {
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);
for (const auto& suit : suits) {
for (const auto& rank : ranks) {
deck.push_back(rank + " of " + suit);
}
}
return deck;
}
void drawFive(std::vector<std::string>& deck, int drawNumber, std::mt19937& gen) {
// Shuffle the remaining deck before this draw
std::shuffle(deck.begin(), deck.end(), gen);
std::cout << "Draw #" << drawNumber << ":\n";
for (int i = 0; i < 5; ++i) {
std::cout << " " << deck[i] << "\n";
}
std::cout << "\n";
// Remove the drawn cards from the deck
deck.erase(deck.begin(), deck.begin() + 5);
}
int main() {
// Number of draws
int draws = 3;
// Build the deck
std::vector<std::string> deck = buildDeck();
// Random engine
std::random_device rd;
std::mt19937 gen(rd());
// Perform multiple draws (no duplicates, shuffle before each draw)
for (int i = 1; i <= draws; ++i) {
if (deck.size() < 5) {
std::cout << "Not enough cards left for draw #" << i << ".\n";
break;
}
drawFive(deck, i, gen);
}
}
/*
run:
Draw #1:
9 of Hearts
5 of Diamonds
10 of Clubs
2 of Hearts
9 of Clubs
Draw #2:
4 of Clubs
Q of Hearts
A of Diamonds
J of Clubs
J of Diamonds
Draw #3:
7 of Hearts
7 of Clubs
8 of Clubs
2 of Clubs
5 of Hearts
*/
