reversing a linked list

#include "stdio.h"
#include "stdlib.h"

#define MAX 10 /* max of 10 elements */

struct lnode
{
int number;
struct lnode *next;
};

/* add a lnode at the beginning of the list */
void llist_add_begin(struct lnode **n, int val);
/* reverse the whole list */
void llist_reverse(struct lnode **n);
/* display the whole linked list */
void llist_display(struct lnode *n);

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

/* insert some numbers */
for(i = 0; i <= MAX; i++)
llist_add_begin(&new, i);

printf("linked list before reversal:");
llist_display(new);
llist_reverse(&new);
printf("linked list after reversal:");
llist_display(new);

return 0;
}

/* add a lnode at the beginning of the list */
void llist_add_begin(struct lnode **n, int val)
{
struct lnode *temp = NULL;

/* add new node */
temp = malloc(sizeof(struct lnode));
temp->number = val;
temp->next = *n;
*n = temp;
}

/* reverse the whole list */
void llist_reverse(struct lnode **n)
{
struct lnode *a = NULL;
struct lnode *b = NULL;
struct lnode *c = NULL;
a = *n, b = NULL;

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

*n = b;
}

/* display the whole linked list */
void llist_display(struct lnode *n)
{
while(n != NULL)
printf(" %d", n->number), n = n->next;

printf("\n");
}

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History Of C..

In the beginning was Charles Babbage and his Analytical Engine, a machine
he built in 1822 that could be programmed to carry out different computations.
Move forward more than 100 years, where the U.S. government in
1942 used concepts from Babbage’s engine to create the ENIAC, the first
modern computer.
Meanwhile, over at the AT&T Bell Labs, in 1972 Dennis Ritchie was working
with two languages: B (for Bell) and BCPL (Basic Combined Programming
Language). Inspired by Pascal, Mr. Ritchie developed the C programming
language.

My 1st Program...


#include
#include
void main ()
{
clrscr ();
printf ("\n\n\n\n");
printf ("\t\t\t*******Pankaj *******\n");
printf ("\t\t\t********************************\n");
printf ("\t\t\t\"Life is Good...\"\n");
printf ("\t\t\t********************************");
getch ();
}

Next Step...


#include
#include

void main ()
{
clrscr ();
printf ("\n\n\n\n\n\n\n\n");
printf ("\t\t\t --------------------------- \n\n");

printf ("\t\t\t | IGCT, Info Computers, INDIA | \n\n");
printf ("\t\t\t --------------------------- ");

getch ();

}

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