Double Link List

#include<stdio.h>
#include<Windows.h>

struct data{
    int angka;
    struct data *prev;
    struct data *next;
}*head,*now,*temp;

void ins(){
    int x;
    printf("Masukan Angka yang ingin ditambahkan : ");
    scanf("%d",&x);fflush stdin;
    now=head;
    do{
        if(x>now->angka){
            //printf("%d",now->angka);getchar();
            temp=now;
            now=(struct data*)malloc(sizeof(data));
            now->angka=x;
            now->next=temp;
            now->prev=temp->prev;
            temp->prev=now;
            if(now->prev!=NULL){
                now=now->prev;
                now->next=temp->prev;
            }//kalo dia head
            else
                head=now;
            break;
        }

        else if (now->next==NULL){//kalo tail
            temp=now;
            now=(struct data*)malloc(sizeof(data));
            now->angka=x;
            now->prev=temp;
            now->next=0;
            temp->next=now;
            break;
        }
        else
            now=now->next;
    }while(now!=NULL);
}

int main(){
    head=0;
    temp=0;
    int x=0;
    printf("Berapa Angka Yang ingin diinput? ");
    scanf("%d",&x);fflush stdin;
    do{
        now=(struct data*)malloc(sizeof(data));
        printf("Masukan Angka : ");
        scanf("%d",&now->angka);fflush stdin;
        //Double Link list Start
        now->next=head;
        head=now;
        now->prev=NULL;
        if(now->next!=0){
            temp=now;
            now=now->next;
            now->prev=temp;
        }
        // Double Link list end
        /*now->next=head;
        head=now;*/ //Single Link List
        x--;
        system("cls");
        now=head;
        do{
            printf("%d",now->angka);
            if (now->next!=NULL)
                printf(" -> ");
            now=now->next;
        }while(now!=NULL);
        printf("\n");
    }while(x>0);
    ins();
    system("cls");
    now=head;
    do{
        //printf("((Prev)%d) (Now)%d) %d ((Next)%d) -> ",now->prev,now,now->angka,now->next); //Ngecek bener ga nya
        printf("%d",now->angka);
        if (now->next!=NULL)
            printf(" -> ");
        now=now->next;
    }while(now!=NULL);
    getchar();
}