public class MyClass{

static int data[]=new int[8];
static int kepala;
static int ekor;
    static void create(){
        kepala=ekor=-1;
    }
    static int isEmpty(){
        if(ekor==-1){
            return 1;
        }else{
            return 0;
        }
    }
    static int isFull(){
        if(ekor==8-1){
            return 1;
        }else{
            return 0;
        }
    }
    static void insert(int isi){
        if(isEmpty()==1){
            kepala=ekor=0;
            data[ekor]=isi;
            System.out.println(data[ekor]+" Behasil di tambah");
        }else if(isFull()==0){
            ekor++;
            data[ekor]=isi;
            System.out.println(data[ekor]+" Behasil di tambah");
        }
    }
    static void print(){
        if(isEmpty()==0){
            System.out.println("Data yang ada :");
        for(int i=kepala;i<=ekor;i++){
            System.out.println(data[i]);
            }
        }else{
            System.out.println("Data masih kosong!");
        }
    }
    static void clear(){
        kepala=ekor=-1;
        System.out.println("Data berhasil dikosongkan !");
    }

    public static void main() {
    int menu;
    int a;
    create();
    do{
        System.out.println("1. Insert");
        System.out.println("2. Clear");
        System.out.println("3. Print");
        System.out.println("4. Exit");
        System.out.print("Pilih Menu : ");
            menu=Input.readInt();
        switch(menu){
            case 1: System.out.print("Masukkan data : ");
                    a=Input.readInt();
                    insert(a);break;
            case 2: clear();
                    break;
            case 3: print();
                System.out.println();
                    break;
            }
        } while(menu!=4);
    }
}