Hi, as you can see, I'm really don't know what's the best way to do this...
This is an example of what I'm trying to do:
struct NAME{
//Fields...
}
int main()
{
struct NAME *pointer;
(give the pointer a size with malloc);
function(pointer);
}
void function(struct NAME *pointer)
{
now here is where I get confused, do I have to do malloc again (pass the size of the pointer to function)? Or theres no need?
}
No, a pointer simply contains the address of some allocated memory. So you pass a pointer to some function so that function has the address to your allocated memory.
Think of a pointer as a note or something that contains the address to your actual object or memory.
Ok, I think I get your point.
But I still got a problem a bit related to this... This is the logic of my 'program' (very simple):
I have declared a pointer to a structure in main.
struct LINEA *lista;
I pass it to a function like this:
llegirlineasTxt(lista);
Now in my function, I give the pointer the size with malloc, and then scan a file to put to the fields of the structures some values:
while(!feof(lineasTxt))
{
fscanf(lineasTxt,"%c" ,&lista[numLinia].identificador);
fscanf(lineasTxt, "%s", &lista[numLinia].nombre);
fscanf(lineasTxt, "%d",&lista[numLinia].valor);
getc(lineasTxt);
numLinia++;
All ok at this point
And if I print some results (just to test it) like this:
int i;
for(i = 0; i<7; i++)
printf("%c\n", lista[i].identificador);
for(i = 0; i<7; i++)
printf("%d\n", lista[i].valor);
If I put this inside that function, it prints the results correctly.. now if I instead put this piece of code in main (right after calling the function). I get a 'bus error' , or I get some weird values...
Anyone knows what's the matter?
Post the code. Also read the FAQ on using feof as the loop condition (it's bad).
