Add write the data into file by linked list data

data/books.txt

@@ -1,6 +1,9 @@
-My First Book
-Sambo Chea
-892-928-990
-My Second Book
-Chea Sambo
-939-330-332
+My Third Book
+Zero 1
+000-000-111
+My Fouth Book
+1 Zero
+111-000-000
+My Fifth Book
+2 Zero
+222-000-000

tests/bookNode.c

@@ -17,14 +17,14 @@ BOOK *head;
 void add_book(char *title, char *author, char *isbn);
 void display();
 int count();
-void save_book_data(struct book *selection);
+void save_book_data(struct book *data);
 
 int main()
 {
     head = NULL;
     add_book("My Third Book", "Zero 1", "000-000-111");
     add_book("My Fouth Book", "1 Zero", "111-000-000");
-    add_book("My Fouth Book", "1 Zero", "111-000-000");
+    add_book("My Fifth Book", "2 Zero", "222-000-000");
 
     int i;
     file = fopen("./data/books.txt", "a+");
@@ -35,42 +35,65 @@ int main()
         return EXIT_FAILURE;
     }
 
-    char title[20];
-    char author[20];
-    char isbn[20];
+    // char title[20];
+    // char author[20];
+    // char isbn[20];
 
-    while (!feof(file))
+    // while (!feof(file))
+    // {
+    //     fgets(title, 20, file);
+    //     fgets(author, 20, file);
+    //     fgets(isbn, 20, file);
+
+    //     // Removes newline characters from the ends of the names
+    //     i = 0;
+
+    //     while (title[i] != '\n')
+    //     {
+    //         i++;
+    //     }
+
+    //     title[i] = '\0';
+
+    //     i = 0;
+
+    //     while (author[i] != '\n')
+    //     {
+    //         i++;
+    //     }
+
+    //     author[i] = '\0';
+
+    //     // Adds the entry from the strings with the file data in them
+    //     add_book(title, author, isbn);
+    // }
+
+    BOOK *temp;
+    temp = head;
+
+    fputs(temp->title, file);
+    fputs("\n", file);
+    fputs(temp->author, file);
+    fputs("\n", file);
+    fputs(temp->isbn, file);
+
+    while (temp->next != NULL)
     {
-        fgets(title, 20, file);
-        fgets(author, 20, file);
-        fgets(isbn, 20, file);
-
-        // Removes newline characters from the ends of the names
-        i = 0;
-
-        while (title[i] != '\n')
-        {
-            i++;
-        }
-
-        title[i] = '\0';
-
-        i = 0;
-
-        while (author[i] != '\n')
-        {
-            i++;
-        }
-
-        author[i] = '\0';
-
-        // Adds the entry from the strings with the file data in them
-        add_book(title, author, isbn);
+        temp = temp->next;
+        fputs("\n", file);
+        fputs(temp->title, file);
+        fputs("\n", file);
+        fputs(temp->author, file);
+        fputs("\n", file);
+        fputs(temp->isbn, file);
     }
 
     // close the file
     fclose(file);
 
+    // save book data
+    // save_book_data(head);
+
     // display();
 
     int countEntries = count();
@@ -81,16 +104,17 @@ int main()
 
 void add_book(char *title, char *author, char *isbn)
 {
-    struct book *tempNode, *iterator;
-    tempNode = (struct book *)malloc(sizeof(struct book));
-    tempNode->title = title;
-    tempNode->author = author;
-    tempNode->isbn = isbn;
+    struct book *temp, *iterator;
+    temp = (struct book *)malloc(sizeof(struct book));
+    temp->title = title;
+    temp->author = author;
+    temp->isbn = isbn;
+    // ref
     iterator = head;
 
     if (head == NULL)
     {
-        head = tempNode;
+        head = temp;
         head->next = NULL;
     }
     else
@@ -99,8 +123,8 @@ void add_book(char *title, char *author, char *isbn)
         {
             iterator = iterator->next;
         }
-        tempNode->next = NULL;
-        iterator->next = tempNode;
+        temp->next = NULL;
+        iterator->next = temp;
     }
 }
 
@@ -109,7 +133,8 @@ int count()
     int n = 1;
     BOOK *temp;
     temp = head;
-    if (head == NULL) {
+    if (head == NULL)
+    {
         return 0;
     }
 
@@ -120,4 +145,39 @@ int count()
     }
 
     return n;
+}
+
+void save_book_data(struct book *data)
+{
+    file = fopen("./data/books.txt", "a+");
+
+    if (file == NULL)
+    {
+        printf("Error: addressbook.dat could not be opened.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    BOOK *temp;
+    temp = data;
+
+    if (temp == NULL)
+    {
+        return;
+    }
+
+    fputs(temp->title, file);
+    fputs(temp->author, file);
+    fputs(temp->isbn, file);
+
+    while (temp->next != NULL)
+    {
+        temp = temp->next;
+
+        fputs(temp->title, file);
+        fputs(temp->author, file);
+        fputs(temp->isbn, file);
+    }
+
+    fflush(file);
+    fclose(file);
 }