Why do we leave some structure variables out of the curly brackets?

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I'm trying to understand struct in C. I couldn't get the idea about this definition below. Why do we leave aCard, deck[ ] and *cardPtr out? What is the difference between including them in and leaving them out?

 struct card 
 char *face;
 char *suit;
 aCard, deck[52], *cardPtr;

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

Think of it this way: the deck, per example is not the property of a card. A card can exist on its own without a deck. So the deck is not part of card.
â€“Â Blaze
23 mins ago

add a commentÂ |Â

up vote
8
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favorite

 struct card 
 char *face;
 char *suit;
 aCard, deck[52], *cardPtr;

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

Think of it this way: the deck, per example is not the property of a card. A card can exist on its own without a deck. So the deck is not part of card.
â€“Â Blaze
23 mins ago

add a commentÂ |Â

up vote
8
down vote

favorite

 struct card 
 char *face;
 char *suit;
 aCard, deck[52], *cardPtr;

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

 struct card 
 char *face;
 char *suit;
 aCard, deck[52], *cardPtr;

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

edited 16 mins ago

Micha Wiedenmann

9,0081061100

edited 16 mins ago

Micha Wiedenmann

9,0081061100

edited 16 mins ago

Micha Wiedenmann

9,0081061100

asked 28 mins ago

Belverus

514

asked 28 mins ago

Belverus

514

asked 28 mins ago

Belverus

514

Think of it this way: the deck, per example is not the property of a card. A card can exist on its own without a deck. So the deck is not part of card.
â€“Â Blaze
23 mins ago

add a commentÂ |Â

Think of it this way: the deck, per example is not the property of a card. A card can exist on its own without a deck. So the deck is not part of card.
â€“Â Blaze
23 mins ago

Think of it this way: the deck, per example is not the property of a card. A card can exist on its own without a deck. So the deck is not part of card.
â€“Â Blaze
23 mins ago

add a commentÂ |Â

5 Answers
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up vote
8
down vote

accepted

You are mixing things up. A struct card has the fields face and suit. But there are three variables using the struct card type, namely aCard, deck, cardPtr.

Alternatively one could have written:

typdef struct 
 char *face;
 char *suit;
 Card;

Card aCard, deck[52], *cardPtr;
// or even
Card aCard;
Card deck[52];
Card *cardPtr;

For the typedef have a look at: Why should we typedef a struct so often in C? (It goes into typedef struct ... Foo; vs struct Foo ... debate).

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

add a commentÂ |Â

up vote
4
down vote

Your piece of code could be written like this which makes it clearer:

struct card // define the struct card
 char *face;
 char *suit;
 ;

struct card aCard; // declare a variable "aCard" of type "struct card "
struct card deck[52] // declare an array of 52 variables of type "struct card"
struct card *cardPtr; // declare a variable "cardPtr" of type "pointer to struct card"

answered 21 mins ago

Jabberwocky

24.9k93666

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struct card 
 char *face;
 char *suit;

is just like int, but it is user defined, and

aCard, deck[52], *cardPtr;

are variable names, e.g.

int aCard, deck[41], *cardPtr;

answered 21 mins ago

BladeMight

7861021

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aCard and the rest you have mentioned are variables of type struct card and each of these variables contain char *face and char *suit. So how can some variable can contain itself i.e. aCard being inside the struct node.

answered 24 mins ago

Observer

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You have declared three variables. aCard is of type struct card, deck is of type struct card[52] and cardPtr is of type struct card *

answered 22 mins ago

Broman

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5 Answers
5

active

oldest

votes

5 Answers
5

active

oldest

votes

up vote
8
down vote

accepted

You are mixing things up. A struct card has the fields face and suit. But there are three variables using the struct card type, namely aCard, deck, cardPtr.

Alternatively one could have written:

typdef struct 
 char *face;
 char *suit;
 Card;

Card aCard, deck[52], *cardPtr;
// or even
Card aCard;
Card deck[52];
Card *cardPtr;

For the typedef have a look at: Why should we typedef a struct so often in C? (It goes into typedef struct ... Foo; vs struct Foo ... debate).

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

add a commentÂ |Â

up vote
8
down vote

accepted

You are mixing things up. A struct card has the fields face and suit. But there are three variables using the struct card type, namely aCard, deck, cardPtr.

Alternatively one could have written:

typdef struct 
 char *face;
 char *suit;
 Card;

Card aCard, deck[52], *cardPtr;
// or even
Card aCard;
Card deck[52];
Card *cardPtr;

For the typedef have a look at: Why should we typedef a struct so often in C? (It goes into typedef struct ... Foo; vs struct Foo ... debate).

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

add a commentÂ |Â

up vote
8
down vote

accepted

You are mixing things up. A struct card has the fields face and suit. But there are three variables using the struct card type, namely aCard, deck, cardPtr.

Alternatively one could have written:

typdef struct 
 char *face;
 char *suit;
 Card;

Card aCard, deck[52], *cardPtr;
// or even
Card aCard;
Card deck[52];
Card *cardPtr;

For the typedef have a look at: Why should we typedef a struct so often in C? (It goes into typedef struct ... Foo; vs struct Foo ... debate).

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

You are mixing things up. A struct card has the fields face and suit. But there are three variables using the struct card type, namely aCard, deck, cardPtr.

Alternatively one could have written:

typdef struct 
 char *face;
 char *suit;
 Card;

Card aCard, deck[52], *cardPtr;
// or even
Card aCard;
Card deck[52];
Card *cardPtr;

For the typedef have a look at: Why should we typedef a struct so often in C? (It goes into typedef struct ... Foo; vs struct Foo ... debate).

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

edited 18 mins ago

answered 26 mins ago

Micha Wiedenmann

9,0081061100

answered 26 mins ago

Micha Wiedenmann

9,0081061100

answered 26 mins ago

Micha Wiedenmann

9,0081061100

add a commentÂ |Â

up vote
4
down vote

Your piece of code could be written like this which makes it clearer:

struct card // define the struct card
 char *face;
 char *suit;
 ;

struct card aCard; // declare a variable "aCard" of type "struct card "
struct card deck[52] // declare an array of 52 variables of type "struct card"
struct card *cardPtr; // declare a variable "cardPtr" of type "pointer to struct card"

answered 21 mins ago

Jabberwocky

24.9k93666

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up vote
4
down vote

Your piece of code could be written like this which makes it clearer:

struct card // define the struct card
 char *face;
 char *suit;
 ;

struct card aCard; // declare a variable "aCard" of type "struct card "
struct card deck[52] // declare an array of 52 variables of type "struct card"
struct card *cardPtr; // declare a variable "cardPtr" of type "pointer to struct card"

answered 21 mins ago

Jabberwocky

24.9k93666

add a commentÂ |Â

up vote
4
down vote

Your piece of code could be written like this which makes it clearer:

struct card // define the struct card
 char *face;
 char *suit;
 ;

struct card aCard; // declare a variable "aCard" of type "struct card "
struct card deck[52] // declare an array of 52 variables of type "struct card"
struct card *cardPtr; // declare a variable "cardPtr" of type "pointer to struct card"

answered 21 mins ago

Jabberwocky

24.9k93666

Your piece of code could be written like this which makes it clearer:

struct card // define the struct card
 char *face;
 char *suit;
 ;

struct card aCard; // declare a variable "aCard" of type "struct card "
struct card deck[52] // declare an array of 52 variables of type "struct card"
struct card *cardPtr; // declare a variable "cardPtr" of type "pointer to struct card"

answered 21 mins ago

Jabberwocky

24.9k93666

answered 21 mins ago

Jabberwocky

24.9k93666

answered 21 mins ago

Jabberwocky

24.9k93666

answered 21 mins ago

Jabberwocky

24.9k93666

add a commentÂ |Â

up vote
2
down vote

struct card 
 char *face;
 char *suit;

is just like int, but it is user defined, and

aCard, deck[52], *cardPtr;

are variable names, e.g.

int aCard, deck[41], *cardPtr;

answered 21 mins ago

BladeMight

7861021

add a commentÂ |Â

up vote
2
down vote

struct card 
 char *face;
 char *suit;

is just like int, but it is user defined, and

aCard, deck[52], *cardPtr;

are variable names, e.g.

int aCard, deck[41], *cardPtr;

answered 21 mins ago

BladeMight

7861021

add a commentÂ |Â

up vote
2
down vote

struct card 
 char *face;
 char *suit;

is just like int, but it is user defined, and

aCard, deck[52], *cardPtr;

are variable names, e.g.

int aCard, deck[41], *cardPtr;

answered 21 mins ago

BladeMight

7861021

struct card 
 char *face;
 char *suit;

is just like int, but it is user defined, and

aCard, deck[52], *cardPtr;

are variable names, e.g.

int aCard, deck[41], *cardPtr;

answered 21 mins ago

BladeMight

7861021

answered 21 mins ago

BladeMight

7861021

answered 21 mins ago

BladeMight

7861021

answered 21 mins ago

BladeMight

7861021

add a commentÂ |Â

up vote
1
down vote

answered 24 mins ago

Observer

956113

add a commentÂ |Â

up vote
1
down vote

answered 24 mins ago

Observer

956113

add a commentÂ |Â

up vote
1
down vote

answered 24 mins ago

Observer

956113

answered 24 mins ago

Observer

956113

answered 24 mins ago

Observer

956113

answered 24 mins ago

Observer

956113

answered 24 mins ago

Observer

956113

add a commentÂ |Â

up vote
0
down vote

You have declared three variables. aCard is of type struct card, deck is of type struct card[52] and cardPtr is of type struct card *

answered 22 mins ago

Broman

5,64092241

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up vote
0
down vote

You have declared three variables. aCard is of type struct card, deck is of type struct card[52] and cardPtr is of type struct card *

answered 22 mins ago

Broman

5,64092241

add a commentÂ |Â

up vote
0
down vote

You have declared three variables. aCard is of type struct card, deck is of type struct card[52] and cardPtr is of type struct card *

answered 22 mins ago

Broman

5,64092241

You have declared three variables. aCard is of type struct card, deck is of type struct card[52] and cardPtr is of type struct card *

answered 22 mins ago

Broman

5,64092241

answered 22 mins ago

Broman

5,64092241

answered 22 mins ago

Broman

5,64092241

answered 22 mins ago

Broman

5,64092241

add a commentÂ |Â

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