What is the difference between the 2 syntax of code. Wich one is correct 1 or 2.

Question

Typedef struct element {
Int val;
Struct element *suivant
}element;

element *init (element * L)
{
L=NULL;
Return L;
}

When we will call the function init in the main
1--
Int main(){
element *a;
a= init(L)
2--
Int main(){
element *a;
a= init(&L);

Answer 1

L is undefined. What is L there?

Function is getting a structure so its not primitive value so it it pass address normal way.. 1st suites but it may depend on L type also..

Answer 2

L is a pointer that point to the structure element.

Answer 3

In main? Not in function.
If structure pointer, 1st works.

Answer 4

No it shout be a=init(a)

Answer 5

Yes. That works and thats what I saying..
a is defined so
a = init(a) ; is fine. but a = init(L) error for L is undefined...

Answer 6

Is going to be a =init(a) or a =init(&a)

Answer 7

amal 01 correct syntax for passing struct pointer there in your code sample is
element *a;
init(a);