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Is this efficient code or can it be compressed

OUIJ (50)
I am in my first year of coding in school. While on break I am continuing to learn C++ on my own. This is not a finished product due to the fact that I haven't wrote the function to keep score of the money earned or lost. I am trying to see if this code that I have written is efficient. Any input would be greatly appreciated.

#include<iostream>
#include<cmath>
#include<cstdlib>
#include<string>
#include<vector>
#include<ctime>
#include<iomanip>
#include <algorithm>
using namespace std;

void seedADeckOfCards(vector<int>&);
void dealFiveCardHand(vector<int>&, int [], char []);
void exchangeCards(int[], vector<int>&, int&, char []);
bool wantToSwapcards();
void outputDeck(const vector<int>&);

const int HAND = 5;

int main()
{
char suit[5];
int num = time(0);
srand(num);
vector<int> cardDeck;
int cardHand[5];

seedADeckOfCards(cardDeck);
std::random_shuffle(cardDeck.begin(), cardDeck.end());
dealFiveCardHand(cardDeck, cardHand, suit);

system ("PAUSE");
return 0;
}

void seedADeckOfCards(vector<int> &deckOfCards)
{
for(int i = 0; i < 52; i++)
deckOfCards.push_back(i+1);
}

void dealFiveCardHand(vector<int> &deckOfCards, int cardHand[], char suit[])
{
int card;
int dealFromBack = 51;
for(int i = 0; i < HAND; i++)
{
deckOfCards[dealFromBack] % 13 + 1;
cout << "CARD " << (i+1) << " = ";
cout << setw(3) << deckOfCards[dealFromBack] % 13 + 1 << " ";
suit[i] = deckOfCards[dealFromBack]%4+3;
cout << suit[i] << endl;
cardHand[i] = deckOfCards[dealFromBack] % 13 + 1;
deckOfCards.pop_back();
--dealFromBack;
}

exchangeCards(cardHand, deckOfCards, dealFromBack, suit);

cout << "Your new Hand is: \n";
for(int i = 0; i < HAND; i++)
{
cout << setw(3) << cardHand[i] << " ";
cout << suit[i] << endl;
}
cout << endl;
}

void exchangeCards(int fiveCardHand[], vector<int>& deck, int& sizeOfDeck, char suit[])
{
int howManyToSwap;
int cardToSwap, card;
vector<int> swapTheseCards;

if(wantToSwapcards())
{
do
{
cout << "How many cards do you want to swap? ";
cin >> howManyToSwap;
if(howManyToSwap < 1 || howManyToSwap > 5)
cout << "Invalid Entry!! Must be between 1-5\n";
}while(howManyToSwap < 1 || howManyToSwap > 5);



if(howManyToSwap > 1 && howManyToSwap < 5)
{
cout << "Enter the card(s) number (1-5) you want to exchange with a space between them. \n";
cout << "Swap card(s) number : ";

for(int i = 0; i < howManyToSwap; i++)
{
cin >> cardToSwap;
swapTheseCards.push_back(cardToSwap);
}
}
}

for(int i = 0; i < swapTheseCards.size(); i++)
{
card = deck[sizeOfDeck] % 13 + 1;
int num;
num = swapTheseCards[i];
num = num - 1;
fiveCardHand[num] = card;
suit[num] = deck[sizeOfDeck] % 4 + 3;
deck.pop_back();
--sizeOfDeck;
}
}

bool wantToSwapcards()
{
char answerSwap;
bool answer = false;
do
{
cout << "Do you want to swap any of your cards? (Y or N) ";
cin >> answerSwap;
if(!(answerSwap == 'y' || answerSwap == 'Y' || answerSwap == 'n' || answerSwap == 'N'))
cout << "Invalid entry enter Y or N ONLY!!\n";
}while(!(answerSwap == 'y' || answerSwap == 'Y' || answerSwap == 'n' || answerSwap == 'N'));

if(answerSwap == 'y' || answerSwap == 'Y')
answer = true;
}

void outputDeck(const vector<int>& deck)
{
for(int i = 0; i < deck.size(); i++)
{
cout << setw(3) << deck[i] % 13 + 1;
char suit = deck[i] % 4 + 3;
cout << suit << endl;
}
}
Hippogriff (727)
Edit your post and put [ Code ] [ /Code ] tags so we can see everything clearly, then we will let you know.
Duthomhas (13206)
ValliusDax (70)
system ("PAUSE"); is considered poor form.

Also you're passing array's around from function to function. That means the entire array needs to be copied into a new memory space. You should pass using pointers. For example:

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void dealFiveCardHand(vector<int> &deckOfCards, int *cardHand[], char *suit[])
    {
        int card;        
        int dealFromBack = 51;        
        for(int i = 0; i < HAND; i++)        
        {
            deckOfCards[dealFromBack] % 13 + 1;
            cout << "CARD " << (i+1) << " = ";
            cout << setw(3) << deckOfCards[dealFromBack] % 13 + 1 << " ";
            suit[i] = deckOfCards[dealFromBack]%4+3;
            cout << suit[i] << endl;
            cardHand[i] = deckOfCards[dealFromBack] % 13 + 1;
            deckOfCards.pop_back();
            --dealFromBack;
        }
 }
Last edited on
Duthomhas (13206)
ValliusDax wrote:
That means the entire array needs to be copied into a new memory space. You should pass using pointers.

Alas, that is not the case.

Arrays are passed by pointer -- the array name degenerates to a pointer, and the argument int cardHand[] is itself a pointer -- it could have been written with the equivalent int *cardHand.

In short, OP made no error there.
ValliusDax (70)
My bad Duoas... did not know that... **scribbles in note book**
OUIJ (50)
Thanks for the info everyone. For james I reposted the code below.
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#include<iostream>
#include<cmath>
#include<cstdlib>
#include<string>
#include<vector>
#include<ctime>
#include<iomanip>
#include <algorithm>
using namespace std;

void seedADeckOfCards(vector<int>&);
void dealFiveCardHand(vector<int>&, int [], char []);
void exchangeCards(int[], vector<int>&, int&, char []);
bool wantToSwapcards();
void outputDeck(const vector<int>&);

const int HAND = 5;

int main()
{
    char suit[5];
    int num = time(0);
    srand(num);
    vector<int> cardDeck;
    int cardHand[5];
    
    seedADeckOfCards(cardDeck);
    std::random_shuffle(cardDeck.begin(), cardDeck.end());
    dealFiveCardHand(cardDeck, cardHand, suit);
   
    system ("PAUSE");
    return 0;
}

void seedADeckOfCards(vector<int> &deckOfCards)
{
     for(int i = 0; i < 52; i++)
     deckOfCards.push_back(i+1);   
}

void dealFiveCardHand(vector<int> &deckOfCards, int cardHand[], char suit[])
{
     int card;
     int dealFromBack = 51;
     for(int i = 0; i < HAND; i++)
     {
      deckOfCards[dealFromBack] % 13 + 1;
      cout << "CARD " << (i+1) << "  = ";
      cout << setw(3) << deckOfCards[dealFromBack] % 13 + 1 << "  ";
      suit[i] = deckOfCards[dealFromBack]%4+3;
      cout << suit[i] << endl;
      cardHand[i] = deckOfCards[dealFromBack] % 13 + 1;
      deckOfCards.pop_back();
      --dealFromBack;
     }
     
     exchangeCards(cardHand, deckOfCards, dealFromBack, suit);
     
     cout << "Your new Hand is: \n";
     for(int i = 0; i < HAND; i++)
     {
      cout << setw(3) << cardHand[i] << " ";
      cout << suit[i] << endl;
     }
     cout << endl;
}

void exchangeCards(int fiveCardHand[], vector<int>& deck, int& sizeOfDeck, char suit[])
{
     int howManyToSwap;
     int cardToSwap, card;
     vector<int> swapTheseCards;
     
     if(wantToSwapcards())
     {
      do
      {
       cout << "How many cards do you want to swap? ";
       cin >> howManyToSwap; 
       if(howManyToSwap < 1 || howManyToSwap > 5)
       cout << "Invalid Entry!! Must be between 1-5\n";
      }while(howManyToSwap < 1 || howManyToSwap > 5);
      
     
      
      if(howManyToSwap > 1 && howManyToSwap < 5)
      {
       cout << "Enter the card(s) number (1-5) you want to exchange with a space between them. \n";
       cout << "Swap card(s) number : ";
       
       for(int i = 0; i < howManyToSwap; i++)
       { 
        cin >> cardToSwap;
        swapTheseCards.push_back(cardToSwap);
       }
      }
     } 
   
    for(int i = 0; i < swapTheseCards.size(); i++)
    {     
     card = deck[sizeOfDeck] % 13 + 1;
     int num;
     num = swapTheseCards[i];
     num = num - 1;
     fiveCardHand[num] = card;
     suit[num] = deck[sizeOfDeck] % 4 + 3;
     deck.pop_back();
     --sizeOfDeck;
    }        
}

bool wantToSwapcards()
{
     char answerSwap;
     bool answer = false;
     do
     {
      cout << "Do you want to swap any of your cards? (Y or N) ";
      cin >> answerSwap;
      if(!(answerSwap == 'y' || answerSwap == 'Y' || answerSwap == 'n' || answerSwap == 'N'))
      cout << "Invalid entry enter Y or N ONLY!!\n";
     }while(!(answerSwap == 'y' || answerSwap == 'Y' || answerSwap == 'n' || answerSwap == 'N'));
     
     if(answerSwap == 'y' || answerSwap == 'Y')
     answer = true;
}

void outputDeck(const vector<int>& deck)
{
     for(int i = 0; i < deck.size(); i++)
     {
      cout << setw(3) << deck[i] % 13 + 1;
      char suit = deck[i] % 4 + 3;
      cout << suit << endl;
     }
}
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