it is a lot faster than python lol
I did and this is what I got:
typedef struct node {
int val;
struct node * next;
} node_t;
node_t * head = NULL;
head = (node_t *) malloc(sizeof(node_t));
if (head == NULL) {
return 1;
}
head->val = 1;
head->next = NULL;
Can somebody explain this to me? Specifically the asterick and malloc?
The * is usually used to show that something is a pointer to an instance of something, I think
why don’t you move this to a separate thread and we can talk more about it?
Um, should I call not-ethan?
no like make a new post asking questions about the code
malloc stands for memory allocate, but I’m not really sure how to explain it. As @9pfs1 said, the * symbol is for using pointers which are also kinda weird. I’m not good enough at C to explain it so that’s all I can really say about it.
okay well I guess I’ll explain it here
typedef struct node creates a struct, (think class in python – it’s not really, but it’s similar)
In it, it includes a val, which stores an integer (an item in the list), and struct node*, which is a pointer to the next item in the list.
Then, we create a new list node_t* head = NULL;
We set the value by allocating a certain amount of memory (the size of the type of node – this is how you are supposed to do it) by doing
head = (node_t*) malloc(sizeof(node_t));
you don’t have to cast it with (node_t*), but in this case they do. read this for more on casting malloc.
if (head == NULL) {
return 1;
}
is optional, this just checks if malloc succeeded, because if it didn’t it would return a null pointer. This would happen if you ran out of memory in a program.
Then,
head->val = 1;
head->next = NULL;
sets the struct’s values. If you wanted to add another item, I guess you would do
node_t* next_item = malloc(sizeof(node_t));
head->next = next_item;
next_item->val = 1;
next_item->next = NULL;
It’s worth noting that trying to use null pointers will usually crash programs.
no it won’t
only if you dereference it will it segfault
That fits my definition of use.
int* a = NULL;
is this using
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No, it definitely is not.
Nah, Assembly cannot be compared to binary.
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wait are you saying w3schools isn’t good, or an IRC server
w3schools isn’t the best, but IRC is
at everything, not just C might I note.
wdym w3schools isn’t the best. you liar!
Maybe a text adventure?