Converting binary to decimal using linked lists: C program

#include <stdio.h>
#include <stdlib.h>
void create();
display();
struct node
{
int data;
struct node *next;
};
struct node *head=NULL,*c,*p,*r;
main()
{
int n,bit,i;
printf("enter the number of bits in the binary number");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("\nenter a bit\n");
scanf("%d",&bit);
create(bit);
}
display();
}
void create(int value)
{
struct node * new = (struct node *)malloc(sizeof(struct node));
new->data = value;
new->next=NULL;
if(head == NULL)
head = new;
else
{
c=head;
while(c->next != NULL)
{
c=c->next;
}
c->next=new;
}
}
display()
{
int dec=0;
if(head == NULL)
printf("list is empty");
else
{
for(c=head;c!=NULL;c=c->next)
{
printf("%d\t",c->data);
dec=dec*2+c->data;
}
printf("\ndecimal equivalent = %d",dec);
}
}

Output: