Linked list - Delete first node
Hi all. I am having trouble deleting the first node from a linked list.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct node
{
int age;
char name[10];
struct node *next;
} person;
void Menu()
{
printf("\n***\tMENU\t***\n");
printf("\n 1.) add");
printf("\n 2.) print");
printf("\n 3.) delete");
printf("\n 0.) EXIT");
printf("\nChoose ---------> ");
}
void Add(cvor **head)
{
person *new = malloc(sizeof(person));
char name[10];
printf("\nEnter name: ");
scanf("%s", name);
strcpy(novi-> name, name);
printf("Enter age: ");
scanf("%d",&novi-> age);
if (*head == NULL)
{
*head = new;
new->next = NULL;
}
else
{
new->next = *head;
*head = new;
}
}
void Print(person **head)
{
person *temp = *head;
int i = 1;
printf("\n\tLIST MEMBERS\n\n");
if (temp == NULL) printf("List is empty!");
else
{
while (temp != NULL)
{
printf("No: %d\tNAME: %s\tAGE: %d\n", i, temp->name, temp->age);
temp = temp->next;
i++;
}
}
printf("\n\n");
}
void Delete(person **head)
{
person *temp = *head;
person *p;
if (temp == NULL) printf("List is already empty!");
else
{
p = temp->next;
free(temp);
temp = p;
}
}
int main (int argc, const char * argv[])
{
person *head = NULL;
int choice;
do
{
Menu();
scanf("%d",&choice);
switch (choice)
{
case 1:
Add(&head);
break;
case 2:
Print(&head);
break;
case 3:
Delete(&head);
break;
default:
printf("\nWRONG CHOICE");
}
} while (choice != 0);
return 0;
}
But it doesn't work as expected. I enter a person, delete it, and when I print the list it isn't deleted. I choose "3" again and get this error messagge
Code:
23324(4767) malloc: *** error for object 0x300230: double free
23324(4767) malloc: *** set a breakpoint in szone_error to debug
