From 560ac1e59f5a19fc7fb699faf85d2cdcd012996d Mon Sep 17 00:00:00 2001
From: CyB3RC0nN0R <kske@outlook.de>
Date: Thu, 30 Jan 2020 07:48:20 +0100
Subject: [PATCH] Added list pointer printing function

---
 Demonstration/main.c         | 22 ++++++++++++++--------
 Implementation/linked_list.c | 11 +++++++++++
 Implementation/linked_list.h |  2 ++
 3 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/Demonstration/main.c b/Demonstration/main.c
index a9aaf94..988a031 100644
--- a/Demonstration/main.c
+++ b/Demonstration/main.c
@@ -46,9 +46,9 @@ void show_insert(Node** list)
 	printf("Enter author of Book: ");
 	scanf_s(" %[^\n]s", author, 101);
 	printf("Enter year of Release: ");
-	scanf_s(" %d", &year);
+	scanf_s("%d", &year);
 	printf("Enter place after which book is inserted: ");
-	scanf_s(" %d", &index);
+	scanf_s("%d", &index);
 
 	list_insert(list_get(*list, index), book_create(title, author, year));
 }
@@ -62,7 +62,7 @@ void show_get(Node** list)
 {
 	int index;
 	printf("Enter place: ");
-	scanf_s(" %d", &index);
+	scanf_s("%d", &index);
 	list_print(list_get(*list, index), &book_print);
 }
 
@@ -70,7 +70,7 @@ void show_remove(Node** list)
 {
 	int index;
 	printf("Enter place: ");
-	scanf_s(" %d", &index);
+	scanf_s("%d", &index);
 	list_remove(list_get(*list, index));
 }
 
@@ -79,7 +79,7 @@ void show_read(Node** list)
 	char path[101], line[256], * title, * author, * year;
 	FILE* CSV;
 
-	printf("Enter the path to the file of haram: ");
+	printf("Enter the path of the CSV file to open: ");
 	gets_s(path, 101);
 
 	if (!(CSV = fopen(path, "r")))
@@ -107,17 +107,17 @@ void show_read(Node** list)
 
 void show_write(Node** list)
 {
-	char path[101], line[256];
+	char path[101];
 	FILE* CSV;
 	Node* node = *list;
 	Book* book;
 
-	printf("Enter the path to the file_s: ");
+	printf("Enter the path of the file to write: ");
 	gets_s(path, 101);
 
 	if (!(CSV = fopen(path, "w")))
 	{
-		puts("Failed to read file!\n");
+		puts("Failed to write file!\n");
 		return;
 	}
 
@@ -131,6 +131,11 @@ void show_write(Node** list)
 	fclose(CSV);
 }
 
+void show_print_pointers(Node** list)
+{
+	list_print_pointers(*list);
+}
+
 void main(void)
 {
 	Node* list = NULL;
@@ -144,6 +149,7 @@ void main(void)
 		{"Remove item by index", '6', (void*)&show_remove, &list},
 		{"READ", 'r', (void*)&show_read, &list},
 		{"RIDE", 'w', (void*)&show_write, &list},
+		{"Print pointers", 'p', (void*)show_print_pointers, &list},
 		{"BLANK", ' ', NULL, NULL},
 		{"Quit", 'q', (void*)&exit, NULL}
 	};
diff --git a/Implementation/linked_list.c b/Implementation/linked_list.c
index 0a8dec4..0a588bb 100644
--- a/Implementation/linked_list.c
+++ b/Implementation/linked_list.c
@@ -1,6 +1,7 @@
 #include "linked_list.h"
 
 #include <stdlib.h>
+#include <stdio.h>
 
 static Node* create(void* data)
 {
@@ -20,6 +21,16 @@ void list_print(Node* head, void (*print_func)(void*))
 	}
 }
 
+void list_print_pointers(Node* head)
+{
+	printf("%-19s%-19s%-19s%-19s\n", "Prev", "Current", "Next", "Data");
+	while (head)
+	{
+		printf("0x%p 0x%p 0x%p 0x%p\n", head->prev, head, head->next, head->data);
+		head = head->next;
+	}
+}
+
 void list_push(Node** head, void* data)
 {
 	Node* node = create(data);
diff --git a/Implementation/linked_list.h b/Implementation/linked_list.h
index 7e9c577..1f1d902 100644
--- a/Implementation/linked_list.h
+++ b/Implementation/linked_list.h
@@ -7,6 +7,8 @@ typedef struct Node {
 
 void list_print(Node* head, void (*print_func)(void*));
 
+void list_print_pointers(Node* head);
+
 void list_push(Node** head, void* data);
 
 void list_append(Node** head, void* data);