How to erase element from one vector and pass this erased value to a new vector

[nikgun1984]

hi,

I am trying to figure out how to eliminate one element in one vector and then pass this value to another vector. In the assignment, there are 5 players where one of them is you as a player and 4 other computer players. I need to pass unnecessary card to player 1, and then player 1 passes one card to player 2 and so on. That means that I am player0, and I will be passed the 7th card from player4.

I got this following code so far:

 #include <string>
#include <iostream>
#include <deque>
#include <vector>
#include <random>
#include <algorithm>
#include <ctime>

using namespace std;

const string suit[] = {"D", "H", "S", "C"};
const string facevalue[] = {"2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"};

deque<string> the_deck =[] {
    deque<string> result;
    for (int i = 0 ; i < 52 ; ++i) {
        result.push_back(facevalue[i % 13] + suit[i % 4]);
    }
    auto eng = default_random_engine(random_device()());
    srand(time(0));
    shuffle(begin(result), end(result), eng);
    return result;
}();

string getCard () {
    auto result = the_deck.front();
    the_deck.pop_front();
    return result;
}

void print_hand(vector<string>& hand) {
    char choice = 'a';
    auto sep = "";
    for(auto& card : hand) {
        cout << sep << "(" << choice << ")" << card;
        sep = " ";
        ++choice;
    }
}

using hand_type = vector<string>;
using player_hands_type = vector<hand_type>;

int main () {
    const int DEAL_CARDS = 7; //number of cards we can deal to each player
    const int PLAYERS = 5; //number of players
    player_hands_type hands;
    srand(time(0));
    for (int player = 0 ; player < PLAYERS ; ++player) {
        hand_type hand;
        generate_n(back_inserter(hand), DEAL_CARDS, getCard);
        hands.push_back(move(hand));
    }
    print_hand(hands[0]);
    cout << "\n\nWhich one to replace? ";


    return 0;
}

Thank you so much

[keskiverto]

Erase?
http://www.cplusplus.com/reference/vector/vector/erase/

1. bar.push_back( foo's element x )
2. foo.erase( element x )


Edit: Move?
http://www.cplusplus.com/reference/algorithm/move/

[nikgun1984]

Thanks a lot. I am also wondering how to iterate between those vectors. So these cards are being passed between the players.

[keskiverto]

constexpr size_t N = 7;
int array[N] {};
for (size_t k = 0; k < 42; ++k ) // merry-go-round?
{
  array[ k ] = array[ (k+1)%N ];
}

[nikgun1984]

Do you mind explaining me what those magic numbers mean, I don't quite understand what u are trying to do in that code.

[keskiverto]

The code as such does nothing sensible.
However, the loop iterates over "cyclic array" multiple times.

* Replace 7 with actual number of players
* Replace 42 with how many times cards are passed
* Replace "int" with "hand of a player"
* Replace assignment with "move card to next player"

Was that the "iterate between vectors" question?

[nikgun1984]

Thanks man for your response again. The times cards are passed are indeterminate till one of the players wins( till one of the players collects all 7 of the same suites of cards). So should I create a function and use it in for loop?