Question

Using C, I need help debugging this program. I have a few error messages that I'm not sure how to fix.

Here is the code I have:

/*

* C Program to Print a Linked List in Reverse Order

*/

#include <stdio.h>

#include <stdlib.h>

struct node

{

int num;

struct node *next;

};

int main()

{

struct node *p = NULL;

struct node_occur *head = NULL;

int n;

printf("Enter data into the list\n");

create(&p);

printf("Displaying the nodes in the list:\n");

display(p);

printf("Displaying the list in reverse:\n");

reversedisplay(p);

release(&p);

return 0;

}

void reversedisplay(struct node *head)

{

if (head != NULL)

{

reversedisplay(head->next);

printf("%d\t", head->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;

if (head == NULL)

{

head = temp;

}

else

{

rear->next = temp;

}

rear = temp;

printf("Do you wish to continue [1/0]: ");

scanf("%d", ch);

} while (ch != 0);

printf("\n");

}

void display(struct node *p)

{

while (p != NULL)

{

printf("%d\t", p->num);

p = p->next;

}

printf("\n");

}

void release(struct node **head)

{

struct node temp = head;

head = head->next;

while (head != NULL)

{

free(temp);

temp = head;

head = head->next;

}

}

Any help is appreciated. Thanks!!

Answer 1

Code:

#include <stdio.h>

#include <stdlib.h>
void create(struct node **head);
void reversedisplay(struct node *head);
void release(struct node **head);
void display(struct node *p);
struct node

{

int num;

struct node *next;

};

int main()

{

struct node *p = NULL;

struct node_occur *head = NULL;

int n;

printf("Enter data into the list\n");

create(&p);

printf("Displaying the nodes in the list:\n");

display(p);

printf("Displaying the list in reverse:\n");

reversedisplay(p);

release(&p);

return 0;

}

void reversedisplay(struct node *head)

{

if (head != NULL)

{

reversedisplay(head->next);

printf("%d\t", head->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;

if (*head == NULL)

{

*head = temp;

}

else

{

rear->next = temp;

}

rear = temp;

printf("Do you wish to continue [1/0]: ");

scanf("%d",&ch);

} while (ch != 0);

printf("\n");

}

void display(struct node *p)

{

while (p != NULL)

{

printf("%d\t", p->num);

p = p->next;

}

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: