Тема: "Указатели". - C++ - Ответ 1593024

#include <cstring>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iostream>
#include <string>
 
// червы, бубны, трефы, пики
char *suits[] = { "H", "D", "C", "S" };
char *values[] = { "2", "3", "4", "5", "6", "7", "8", "9", "10",
                   "J", "Q", "K", "A" };
 
std::string Card(unsigned char card_number) {
  std::string result = values[card_number % 13];
  result += suits[card_number / 13];
  return std::string(values[card_number % 13]) +
         std::string(suits[card_number / 13]);
}
 
class Deck {
 public:
  Deck() : size_(52) {
    SetAll();
    srand(time(NULL));
  }
  void SetAll() {
    size_ = 52;
    memset(cards_, 255, 8);
  }
  bool Has(unsigned char card) {
    return (cards_[card / 8] & (1 << (card % 8))) != 0;
  }
  void Set(unsigned char card) {
    if ((cards_[card / 8] & (1 << (card % 8))) == 0) {
      cards_[card / 8] |= 1 << (card % 8);
      ++size_;
    }
  }
  void Unset(unsigned char card) {
    if ((cards_[card / 8] & (1 << (card % 8))) != 0) {
      cards_[card / 8] &= ~(1 << (card % 8));
      --size_;
    }
  }
  unsigned char Random() {
    assert(size_ > 0);
    unsigned char card;
    do {
      card = rand() % 52;
    } while (!Has(card));
    Unset(card);
    --size_;
    return card;
  }
 private:
  unsigned char cards_[8];
  size_t size_;
};
 
int main(int argc, char *argv[]) {
  Deck deck;
  unsigned char hand[5];
  for (int i = 0; i < 5; ++i) {
    hand[i] = deck.Random();
    std::cout << Card(hand[i]) << " ";
  }
  return 0;
}