#include <stdlib.h> typedef struct node { int val; struct node * next; } node_t; node_t * createHead() { node_t * head = NULL; head = malloc(sizeof(node_t)); head->val = 0; head->next = NULL; return head; } node_t * addNode(node_t * current, int value) { current->next = malloc(sizeof(node_t)); current->next->val = value; current->next->next = NULL; return current->next; } int main(int argc, char** argv) { node_t * head = createHead(); addNode(head, 2); printf("%d", head->next->val); }