Script Linked List C++

tambah_belakang_double.cpp

#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <windows.h>

using namespace std;

struct simpul
{
    int data;
    simpul *next;
    simpul *prev;
};

int main()
{
    simpul *awal=NULL,*akhir=NULL,*baru,*bantu;
    int input;
    char ulang;

    do
    {
        cout << "Isi Data = ";
        if (awal==NULL)
        {
            cout << "Kosong";
        }
        else
        {
            bantu=awal;
            while (bantu!=NULL)
            {
                cout <<bantu->data<< " ";
                bantu=bantu->next;
            }
        }
        cout << "\nMasukkan data = ";
        cin>> input;

        baru= new simpul;
        baru->data= input;
        baru->next= NULL;
        baru->prev= NULL;

        if (awal==NULL)
        {
            awal=baru;
            akhir=baru;
        }
        else
        {
            akhir->next=baru;
            baru->prev=akhir;
            akhir=baru;
        }
        cout << "Ingin tambah lagi (y/t) = ";
        cin >> ulang;
        system("cls");
    }
    while (ulang=='Y' || ulang=='y');
}

tambah_belakang_single.cpp

#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <windows.h>
using namespace std;

struct simpul
{
    int data;
    simpul *next;
    simpul *akhir;
    simpul *awal;
};

int main()
{
    simpul *awal=NULL,*akhir=NULL,*baru,*bantu;
    int data1;
    char ulang;

    do
    {
        cout << "Isi Data = ";
        if (awal==NULL)
        {
            cout << "Kosong";
        }
        else
        {
            bantu=awal;
            while (bantu!=NULL)
            {
                cout <<bantu->data<< " ";
                bantu=bantu->next;
            }
        }
        cout << "\nMasukkan data = ";
        cin>> data1;

        baru=new simpul;
        baru->data=data1;
        baru->next=NULL;
        if (awal==NULL)
            awal=baru;
        else
            akhir->next=baru;
        akhir=baru;
        cout << "Ingin tambah lagi (y/t) = ";
    cin >> ulang;
    system("cls");
    }while (ulang=='Y' || ulang=='y');

}

tambah_depan_double.cpp

#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <windows.h>

using namespace std;

struct simpul
{
    int data;
    simpul *next;
    simpul *prev;
};

int main()
{
    simpul *awal=NULL,*akhir=NULL,*baru,*bantu;
    int input;
    char ulang;

    do
    {
        cout << "Isi Data = ";
        if (awal==NULL)
        {
            cout << "Kosong";
        }
        else
        {
            bantu=awal;
            while (bantu!=NULL)
            {
                cout <<bantu->data<< " ";
                bantu=bantu->next;
            }
        }
        cout << "\nMasukkan data = ";
        cin>> input;

        baru= new simpul;
        baru->data= input;
        baru->next= NULL;
        baru->prev= NULL;

        if (awal==NULL)
        {
            awal=baru;
            akhir=baru;
        }
        else
        {
            baru->next=awal;
            awal->prev=baru;
            awal=baru;
        }
        cout << "Ingin tambah lagi (y/t) = ";
        cin >> ulang;
        system("cls");
    }
    while (ulang=='Y' || ulang=='y');
}

tambah_depan_single.cpp

#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <windows.h>
using namespace std;

struct simpul
{
    int data;
    simpul *next;
    simpul *akhir;
    simpul *awal;
};

int main()
{
    simpul *awal=NULL,*akhir=NULL,*baru,*bantu;
    int data1;
    char ulang;

    do
    {
        cout << "Isi Data = ";
        if (awal==NULL)
        {
            cout << "Kosong";
        }
        else
        {
            bantu=awal;
            while (bantu!=NULL)
            {
                cout <<bantu->data<< " ";
                bantu=bantu->next;
            }
        }
        cout << "\nMasukkan data = ";
        cin>> data1;

        baru=new simpul;
        baru->data=data1;
        baru->next=NULL;
        if (awal==NULL)
            akhir=baru;
        else
            baru->next=awal;

        awal=baru;
        cout << "Ingin tambah lagi (y/t) = ";
    cin >> ulang;
    system("cls");
    }while (ulang=='Y' || ulang=='y');

}