Accessing an Array of Struct type in Function

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  1. #1
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    Question Accessing an Array of Struct type in Function

    Looking for some help from the community. I can't seem to find the exact answer to my question after browsing around.

    I am in the beginning stages of a program and after declaring a struct (cardStruct) then declaring an array of struct type (cardStruct deck[MAX_CARDS]), I am trying to access the array through my function FormCards.

    Here's my problem, hopefully you guys can point me in the right direction.

    Code:
    cards.cpp:39: error: variable or field 'FormCards' declared void
    cards.cpp:39: error: 'cardStruct' was not declared in this scope
    Here's my code:
    Code:
    #include <iostream>#include <cstdlib>
    #include <ctime>
    
    
    
    
    using namespace std;
    
    
    
    
    //Global Constants
    const int MAX_CARDS = 52; //Represents the size of the deck of cards
    const int MAX_SUIT = 13;
    
    
    //Function Declarations
    void FormCards ();
    
    
    int main ()
    {
    
    
        enum SuitType {CLUBS, HEARTS, SPADES, DIAMONDS}; //Enum type to represent each card's suit
        
        struct cardStruct
        {
            SuitType suit;
            int value;
            int point;
            
        };
        cardStruct deck[MAX_CARDS];
    
    
    }
    
    
    
    
    void FormCards (cardStruct deck[])
    {
        int i, k; //loop index
        int index = 0; //Used for assigning points and values in nested for loop
    
    
        //For loop assigns suit
        //13 cards per suit
        for (i = 0; i < MAX_CARDS; i++)
        {
            if (i < 13)
                deck[i].suit = DIAMOND;
            else if (i < 26)
                deck[i].suit = CLUB;
            else if ( i < 39)
                deck[i].suit = HEART;
            else
                deck[i].suit = SPADE;
        }
    
    
        //Nested for loop assigns values and points
        for (i = 0; i < MAX_SUIT; i++)
        {
            //assign values
            deck[index].value = k + 1;
    
    
            //assign points
            //HEART card sless than 10 has a point of 5
            //HEART cards of J, Q, K have points of 10
            if (deck[index].suit == HEART)
            {
                if (deck[index].value >= 10)
                    deck[index].points = 10;
                else
                    deck[index].points = 5;
    
    
            }
            //Queen of SPADE has a point of 100
                else if (deck[index].suit == SPADE && deck[index].value == 12)
                    deck[index].points = -100;
            //Rest of the cards will have 0 points
                else
                    deck[index].points = 0;
            index++; //Increase index by 1
        }

  2. #2
    SAMARAS std10093's Avatar
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    Nice, France
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    Try writing the code this way

    Code:
    enum SuitType {CLUBS, HEARTS, SPADES, DIAMONDS}; //Enum type to represent each card's suit
    
    struct cardStruct
        {
            SuitType suit;
            int value;
            int point;
             
        };
        
    
    int main ()
    {
         
        cardStruct deck[MAX_CARDS]; 
     
        return 0; /* You had forgot that, or you would write that later */
    }
    Code - functions and small libraries I use


    It’s 2014 and I still use printf() for debugging.


    "Programs must be written for people to read, and only incidentally for machines to execute. " —Harold Abelson

  3. #3
    Registered User
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    Feb 2013
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    Thanks, I had a feeling it was the placement of the struct and enum. However, now my SuitType is not being recognized in the FormCards function. Is this a matter of it not being passed into the struct/array properly?

    Code:
    code.cpp: In function 'void FormCards(cardStruct*)':
    code.cpp:61: error: 'DIAMOND' was not declared in this scope
    code.cpp:63: error: 'CLUB' was not declared in this scope
    code.cpp:65: error: 'HEART' was not declared in this scope
    code.cpp:67: error: 'SPADE' was not declared in this scope
    code.cpp:79: error: 'HEART' was not declared in this scope
    code.cpp:88: error: 'SPADE' was not declared in this scope

  4. #4
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    No, it's a matter of you using different names.

    Given an enum value named CLUBS, the compiler cannot make sense of something named CLUB.
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy or unhelpful in reply to you, or tell you you need to demonstrate more effort before you can expect help, it is likely you deserve it. Suck it up, Sunshine, and read this, this, and this before posting again.

  5. #5
    Registered User
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    Feb 2013
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    Aye...how embarrassing. Well that obviously fixed that. Thanks.

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