Reading and writing a linked list to a file in C
main.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct Node {
int x;
struct Node* next;
} Node;
void deallocate(Node** root) {
Node* curr = *root;
while (curr != NULL) {
Node* aux = curr;
curr = curr->next;
free(aux);
}
*root = NULL;
}
void insert_end(Node** root, int value) {
Node* new_node = malloc(sizeof(Node));
if (new_node == NULL) {
exit(1);
}
new_node->next = NULL;
new_node->x = value;
if (*root == NULL) {
*root = new_node;
return;
}
Node* curr = *root;
while (curr->next != NULL) {
curr = curr->next;
}
curr->next = new_node;
}
void serialize(Node* root) {
FILE* file = fopen("list.txt", "w");
if (file == NULL) {
exit(1);
}
for (Node* curr = root; curr != NULL; curr = curr->next) {
fprintf(file, "%d, ", curr->x);
}
fclose(file);
}
void deserialize(Node** root) {
FILE* file = fopen("list.txt", "r");
if (file == NULL) {
exit(2);
}
int val;
while(fscanf(file, "%d, ", &val) > 0) {
insert_end(root, val);
}
fclose(file);
}
int main(int argc, char* argv[]) {
Node* root = NULL;
Node* root2 = NULL;
// insert_end(&root, -2);
// insert_end(&root, 11);
// insert_end(&root, 22);
// serialize(root);
deserialize(&root);
for (Node* curr = root; curr != NULL; curr = curr->next) {
printf("%d\n", curr->x);
}
deallocate(&root);
// deallocate(&root2);
return 0;
}
