Code:
#include stdio.h
#include stdlib.h
struct node
{
int num;
struct node *next;
struct node *prev;
};
void create(struct node **);
int max(struct node *);
void release(struct node **);
int main()
{
struct node *p = NULL;
int n;
printf("Enter data into the list\n");
create(&p);
n = max(p);
printf("The maximum number entered in the list is %d.\n", n);
release (&p);
return 0;
}
int max(struct node *head)
{
struct node *max, *q;
q = max = head;
while (q != NULL)
{
if (q->num > max->num)
{
max = q;
}
q = q->next;
}
return (max->num);
}
void create(struct node **head)
{
int c, ch;
struct node *temp, *rear;
do
{
printf("Enter number: ");
scanf("%d", &c);
temp = (struct node *)malloc(sizeof(struct node));
temp->num = c;
temp->next = NULL;
temp->prev = NULL;
if (*head == NULL)
{
*head = temp;
}
else
{
rear->next = temp;
temp->prev = rear;
}
rear = temp;
printf("Do you wish to continue [1/0]: ");
scanf("%d", &ch);
} while (ch != 0);
printf("\n");
}
void release(struct node **head)
{
struct node *temp = *head;
*head = (*head)->next;
while ((*head) != NULL)
{
free(temp);
temp = *head;
(*head) = (*head)->next;
}
}
Output:
Enter data into the list
Enter number: 12
Do you wish to continue [1/0]: 1
Enter number: 7
Do you wish to continue [1/0]: 1
Enter number: 23
Do you wish to continue [1/0]: 1
Enter number: 4
Do you wish to continue [1/0]: 1
Enter number: 1
Do you wish to continue [1/0]: 1
Enter number: 16
Do you wish to continue [1/0]: 0
The maximum number entered in the list is 23.
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