Creation of a double linked list

double_linkedlist.c

//By luk0y
#include <stdio.h>
#include <stdlib.h>
struct node {
int data;
struct node *prev;
struct node *post;
};
void main()
{
int x,y;
int i,j,Temp;
struct node *start=NULL,*new_node,*ptr,*pttr;
printf("Enter number of nodes you want to enter : ");//Don't use 0 for giving the number of nodes
scanf("%d",&x);
printf("Enter the data :\n");
while(x!=0)
    {
    scanf("%d",&y);
    new_node=(struct node*)malloc(sizeof(struct node));
    if(new_node==NULL)
        {
        printf("No space");
        }
    else
        {
        if(start==NULL)
            {
            start=new_node;
            new_node->data=y;
            new_node->prev=NULL;
            new_node->post=NULL;
            }
        else
            {
           ptr=start;
           while(ptr->post!=NULL)
            {
            ptr=ptr->post;
            }
            ptr->post=new_node;
            new_node->data=y;
            ptr->post->prev=ptr;
            new_node->post=NULL;
            }
        }
    x--;

}
    printf("\nDouble Linked list : \n");
    new_node=start;
	while(new_node!=NULL)
	{
		printf("%d\n",new_node->data);
		new_node=new_node->post;
	}
}