C Program to reverse a Linked List.

Data structures using C,
C Program to reverse a Linked List. Linked list is a data structure in which the objects are arranged in a linear order. Linked List contains group of nodes, in which each node contains two fields, one is data field and another one is the reference field which contains the address of next node. In this program, We reverse the linked list, but without sorting the linked list.Read more about C Programming Language .

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#include <stdio.h>
#include <stdlib.h>

#define MAX 100

struct leftnode {
int num;
struct leftnode *next;

void linklist_add(struct leftnode **n, int val);

void linklist_reverse(struct leftnode **n);

void linklist_display(struct leftnode *n);

int main(void) {
struct leftnode *new = NULL;
int i = 0;

for(i = 0; i <= MAX; i++)
linklist_add(&new, i);

printf("Linked list before reversal:n");
printf("Linked list after reversal:n");

return 0;

void linklist_add(struct leftnode **n, int val) {
struct leftnode *temp = NULL;
temp = malloc(sizeof(struct leftnode));
temp->num = val;
temp->next = *n;
*n = temp;

void linklist_reverse(struct leftnode **n) {
struct leftnode *a = NULL;
struct leftnode *b = NULL;
struct leftnode *c = NULL;
a = *n, b = NULL;

while(a != NULL) {
c = b, b = a, a = a->next;
b->next = c;

*n = b;

void linklist_display(struct leftnode *n) {
while(n != NULL)
printf(" %d", n->num), n = n->next;


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