Sorry it has no doubt been asked before, but I can't find it in the forum archives and after a day of searching the internet for a solution I need to ask the question. How do I turn the following program fragment into a doubly link list? I ask because I want to print out the list in the order it is entered, but since the lsit adds to the top of the list at the moment it is printed in reverse order. I realise I need to have a prev command in there and that is already in the structure, but i have no idea how to put it into the program and i dont know how to print it either.
#include<stdlib.h>
#include<stdio.h>
#include <string.h>
struct record {
char item[15];
struct record *next, *prev;
};
void insert();
int createroute();
typedef struct record item_node;
item_node * new_item;
item_node * head;
int createlist()
{
char one[15] = "a";
printf("\nEnter as many items as you wish, one per line");
printf("\nTo stop entering items, enter a single x\n");
while (strcmp(one, "x") != 0)
{
printf("Enter an item: ");
gets(one);
if (strcmp(one, "x") == 0)
break;
insert(one);
}
return;
}
void insert(char *one)
{
new_item=malloc(sizeof(item_node));
strcpy(new_item->item, one);
new_item->next=head;
head=new_item;
return;
}
int main()
{
head = NULL;
createlist();
while(new_item != NULL)
{
printf("%s\n", new_item->item);
new_item = new_item->next;
}
}
