-
Notifications
You must be signed in to change notification settings - Fork 0
/
doublylinked.c
80 lines (66 loc) · 1.39 KB
/
doublylinked.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
#include<stdio.h>
#include<stdlib.h>
struct Node {
int data;
struct Node* next;
struct Node* prev;
};
struct Node* head;
struct Node* GetNewNode(int x) {
struct Node* newNode
= (struct Node*)malloc(sizeof(struct Node));
newNode->data = x;
newNode->prev = NULL;
newNode->next = NULL;
return newNode;
}
void InsertAtHead(int x) {
struct Node* newNode = GetNewNode(x);
if(head == NULL) {
head = newNode;
return;
}
head->prev = newNode;
newNode->next = head;
head = newNode;
}
void InsertAtTail(int x) {
struct Node* temp = head;
struct Node* newNode = GetNewNode(x);
if(head == NULL) {
head = newNode;
return;
}
while(temp->next != NULL) temp = temp->next;
temp->next = newNode;
newNode->prev = temp;
}
void Print() {
struct Node* temp = head;
printf("Forward: ");
while(temp != NULL) {
printf("%d ",temp->data);
temp = temp->next;
}
printf("\n");
}
void ReversePrint() {
struct Node* temp = head;
if(temp == NULL) return;
while(temp->next != NULL) {
temp = temp->next;
}
printf("Reverse: ");
while(temp != NULL) {
printf("%d ",temp->data);
temp = temp->prev;
}
printf("\n");
}
int main() {
head = NULL;
InsertAtTail(2); Print(); ReversePrint();
InsertAtTail(4); Print(); ReversePrint();
InsertAtHead(6); Print(); ReversePrint();
InsertAtTail(8); Print(); ReversePrint();
}