import java.util.Scanner;
import java.text.DecimalFormat;
public class kelompok5 {
    public static void main(String[] args) {

    int menu = 0;
    int pilihan1,alas,tinggi;
    double p,l,luas,keliling;
    double hrga=0;
    double disc=0, total;

    Scanner input = new Scanner(System.in);

    System.out.println("Program Kelompok 5");
    System.out.println("- Andre syah fahmi - 201843500975");
    System.out.println("- Boxiadly S Tehuayo - 201843500863");
    System.out.println("- Ikhwan Fadilah - 201843500244");
    System.out.println("- Nurazizah Novalianty - 201843500149");
    System.out.println("- Rifqi A Syahputra - 201843500276");
    System.out.println("------------------");
    System.out.println("1 : mencari luas persegi panjang");
    System.out.println("2 : mencari luas dan keliling segitiga sama sisi");
    System.out.println("3 : segitiga piramida menggunakan for");
    System.out.println("4 : mencari diskon belanja");
    System.out.println("5 : menginput index array 1D menggunakan Scanner");
    System.out.print("Masukan pilihan anda : ");
    pilihan1 = input.nextInt();

    switch (pilihan1) {
        case 1 :

        System.out.println("-------------------------------");
        System.out.println("Menghitung Luas Persegi panjang");
        System.out.println("-------------------------------");
        System.out.print("Panjang(dalam satuan cm) = ");
        p = input.nextDouble();

        System.out.print("Lebar(dalam satuan cm) = ");
        l = input.nextDouble();

        luas = p*l;
        System.out.print("Luas= "+luas+" cm");
        break;

        case 2 :

        System.out.println("--------------------------------------------");
        System.out.println("mencari luas dan keliling segitiga sama sisi");
        System.out.println("--------------------------------------------");
        System.out.print("Masukkan Alas : "); alas = input.nextInt();
        System.out.print("Masukkan Tinggi : "); tinggi = input.nextInt();

        luas = (alas*tinggi)/2;
        keliling = 3*alas;

        System.out.println("Luas Segitiga sama sisi :");
        System.out.println("("+alas+"*"+tinggi+") / 2 = "+luas);
        System.out.println("keliling Segitiga sama sisi :");
        System.out.println("3 * "+alas+"  = "+luas);
        break;

        case 3 :

        System.out.println("---------------------------------");
        System.out.println("segitiga piramida menggunakan for");
        System.out.println("---------------------------------");
        System.out.print("Masukan Input: ");
        int tinggi1 = input.nextInt(); //Mendapatkan Input Dari User

        for(int t=1; t<=tinggi1; t++){
            //Menghitung Jumlah Tinggi Piramida

            for(int s=t; s<=tinggi1; s++){
                //Menghitung Jumlah Spasi per Baris
                System.out.print(" ");
            }

            for(int b=0; b<=(t*2)-2; b++){
                //Menghitung Jumlah Bintang per Baris
                System.out.print("*");
            }

            System.out.println(); //Membuat Baris Baru
        }
         break;


        case 4 :

        System.out.println("-------------------------------");
        System.out.println("Menghitung Total Diskon Belanja");
        System.out.println("-------------------------------");
        System.out.print("Masukkan total belanja: ");
        hrga = input.nextInt();
        System.out.println();

        if(hrga>150000){

            DecimalFormat df = new DecimalFormat("#.##");
            disc= hrga*0.2;
            total= hrga-disc;

            System.out.println("Total Belanja : IDR "+hrga);
            System.out.println("Total Diskon : IDR "+df.format(disc));
            System.out.println("Total Bayar : IDR "+total);
        }
        else{
            System.out.println("Total Belanja : IDR"+hrga);
        }
        break;


        case 5 :

        System.out.println("--------------------------------------------");
        System.out.println("menginput index array 1D menggunakan Scanner");
        System.out.println("--------------------------------------------");
        System.out.print("Masukkan jumlah array : ");
        int jumlah = input.nextInt();
        int [] jumlahArray = new int [jumlah];

        for(int n=0; n<jumlah; n++){
            System.out.print("Masukkan Nilai Array ke["+n+"] : ");jumlahArray[n]= input.nextInt();
        }
        System.out.println();
        for(int m=0; m<jumlah; m++){
            System.out.println(jumlahArray[m]);
        }
         break;

        default:
        System.out.println("Kode Tidak dikenal");
    }
    }
}