Example of linked list creation in C. Note this is merely a struct and function, and does not include a main function or preprocessor imperatives. Used in Harvard's CS50 class.

linked-list.c

typedef struct node
{
    int n;
    struct node *next;
}
node;

bool search(int n, node* list)
{
    node* ptr = list;
    while (ptr != NULL)
    {
        if (ptr->n == n)
        {
            return true;
        }
        ptr = ptr->next;
    }
    return false;
}