Searching and sorting with linked list

#include <iostream>
#include <stdlib.h>

using namespace std;

struct data_barang {
    int harga;
    string namabarang;
    string kode;
};
struct node {
    int index,Urutan;
    data_barang data;
    node *next;
};

node *baru,*awal=NULL,*akhir=NULL,*bantu,*bantu2;

int indeks=-1;

void buatNode(int Urutan,string namabarang,int harga,string kode){
    indeks++;
    baru = new node;
    baru->next = NULL;
    baru->index = indeks;
    baru->Urutan = Urutan;
    baru->data.namabarang = namabarang;
    baru->data.harga = harga;
    baru->data.kode = kode;

    if(awal==NULL){
        awal=akhir=baru;
    }else{
        akhir->next = baru;
        akhir=baru;
    }
}

void tambahData(){
   int Urutan,harga;
   string namabarang,kode;

    cout<<"--------------INVENTARIS TOKO ELEKTRONIK---------------"<<endl;
    cout<<"Urutan       \t\t: "; cin>>Urutan;
    cout<<"Nama Barang  \t\t: "; cin>>namabarang;
    cout<<"Harga        \t\t: "; cin>>harga;
    cout<<"Kode         \t\t: "; cin>>kode;
    buatNode(Urutan,namabarang,harga,kode);
}

void view(){
    if(indeks!=-1){
        bantu = awal;
        for(int i=0;i<=indeks;i++){
            cout << "DATA INVENTARIS TOKO : " << endl;
            cout<<"Urutan       \t\t: "<<bantu->Urutan<<endl;
            cout<<"Nama Barang  \t\t: "<<bantu->data.namabarang<<endl;
            cout<<"Harga        \t\t: "<<bantu->data.harga<<endl;
            cout<<"Kode         \t\t: "<<bantu->data.kode<<endl;
            bantu=bantu->next;
        }
    }
}

void view(int cari)
{
      if(indeks!=-1){
        bantu = awal;
        for(int i=0;i<=indeks;i++){
                if(cari == bantu->Urutan)
                {
                    cout << "DATA INVENTARIS TOKO : " << endl;
                    cout<<"Urutan       \t\t: "<<bantu->Urutan<<endl;
                    cout<<"Nama Barang  \t\t: "<<bantu->data.namabarang<<endl;
                    cout<<"Harga        \t\t: "<<bantu->data.harga<<endl;
                    cout<<"Kode         \t\t: "<<bantu->data.kode<<endl;
                }
            bantu=bantu->next;
        }
         system("pause");
    }

}

void urutkanMenaik(){
    node *tmp;
    bantu = awal;
    for(int i=0;i<indeks;i++){
        bantu=bantu2=awal;
        while(bantu->next!=NULL){
            if(bantu->Urutan > bantu->next->Urutan){
                tmp = bantu->next;
                bantu->next = bantu->next->next;
                tmp->next = bantu;
                if(bantu==awal){
                    awal=bantu2=tmp;
                }else{
                    bantu2->next=tmp;
                }
                bantu=tmp;
            }
            bantu2 = bantu;
            bantu = bantu->next;
        }
    }
}
node *cariTengah(node *awalNode,node *akhirNode){
    if(awalNode == NULL){
        return NULL;
    }

    node *sekarang = awalNode;
    node *depan = awalNode->next;

    while(depan!=akhirNode){
        depan = depan->next;
        if(depan!=akhirNode){
            sekarang = sekarang->next;
            depan = depan->next;
        }
    }
    return sekarang;
}
bool cekUrutMenaik(){
    if(indeks == -1 || indeks == 0){
        return true;
    }

    bantu = awal;
    for(int i=0;i<indeks;i++){
        if(bantu->Urutan> bantu->next->Urutan ){
            return false;
        }
        bantu=bantu->next;
    }
    return true;
}


void cari(){
        bantu = awal;
        bantu2 = NULL;
        int carikode;
        cout << "Masukkan Urutan yang mau di cari : ";
        cin >> carikode;
        view(carikode);
}


    int main()
{
    int menu;
    do{
        system("cls");
        view();
        cout << "---------------------INVENTARIS TOKO ELEKTRONIK----------------------" <<endl;
        cout << "Menu : " << endl;
        cout << "1. Inputkan data" << endl;
        cout << "2. Mengurutkan " << endl;
        cout << "3. Pencarian" << endl;
        cout << "4. Keluar" << endl;
        cout << "Masukkan menu :";
        cin >> menu;

        if(menu == 1){
            tambahData();
        }else if(menu == 2){
            urutkanMenaik();
        }else if(menu == 3){
            cari();
        }

    }while(menu !=4);
}