CODEWITHSUNDEEP
cstruct
iAmoric
iAmoric

Reputation: 1975

Rewrite struct without typedef

I have this struct :

typedef struct std_fifo{
    char* name;
    struct std_fifo* next;
}std_fifo, *fifo;

And the two following methods :

char* remove(fifo* f){
    if((*f)==NULL)
        return NULL;
    char* tmp=(*f)->name;
    fifo tmpFifo= *f;
    *f=(*f)->next;
    free(tmpFifo);
    return tmp;
}

fifo add(fifo f,char* new){
    if(f==NULL){
        fifo newFifo=malloc(sizeof(std_fifo));

        newFifo->name=malloc(strlen(new)+1);

        strcpy(newFifo->name,new);
        newFifo->next=NULL;
        return newFifo;
    }
    f->next=add(f->next,new);
    return f;
}

I would like to rewrite this, but without the typedef fifo*. I mean with this struc :

struct Fifo{
    char* name;
    struct Fifo* next;
};

My question may seem ridiculous but I have difficulities with struct and typedef, so it would be really nice if someone could help me.

Thanks a lot.

EDIT:

I did something like that :

char* remove(struct Fifo* fifo){
    if(fifo == NULL)
        return NULL;
    char* name = fifo->name;
    fifo = fifo->next;
    return name;
}

Is it correct ?

Upvotes: 0

Views: 244

Answers (2)

Ripi2
Ripi2

Reputation: 7198

struct defines a NOT trivial type (int, char, etc are trivial types), containing one or more fields. typedefdefines an alias, a short version of a long definition. Despite of the world being full of trivial typedefs, such use is not advised; better reserve it for not trivial, long definitions.

For example, let's define a pointer to an unsigned int, and then a var of that type:

typedef unsigned int* uip;
uip myVar; //myVar is a pointer to an unsigned int

Using a typedef struct combination may be possible (?). Anyhow is not needed because struct is another word used for definintions.

struct myType
{
    int val;
    char* array;
/*...*/
}
myType myStruct; //myStruct is of type myType

Upvotes: 0

Jonathon Reinhart
Jonathon Reinhart

Reputation: 137527

You have to use struct Fifo everywhere. The struct token is part of its name.

For example:

char* remove(struct Fifo* f) {

Upvotes: 1

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