Prak Algo Modul 2 (java)

1.    Buatlah flowchart dan program pemilihan dengan switch case dengan semua jumlah batasan merupakan inputan dari keyboard !

Ø  Menampilkan deret bilangan ganjil dan menghitung jumlah seluruh deret yang ditampilkan

Ø  Program untuk menampilkan deret fibonaci.

OPI

Output :  Tampilan berupa menu pilihan :

1.      Menampilkan deret bilangan ganjil dan menghitung jumlah seluruh deret.

2.      Menampilkan deret fibonaci.

Setelah user memilih salah satu menu akan terjadi tampilan sesuai dengan menu yang dipilih

Proses :   Pilihan 1:

                     total = 0

                     diulang i = 1 sampai dengan N

                           diuji jika (N%2=1) maka

                                 cetak i, total = total +1

                     cetak total

               Pilihan 2 :

                     a = 1, b = 1

                     cetak a,b

                     d = N-2

                     selama (d>0)

                           c=a+b

                           cetak c

                           a=b,b=c

                           d- -

Input :    N dan pilihan

 

Flowchart IPO

Analisa

Input :    N = 8            pilihan = 1 , 2

Proses:    pilihan 1 à proses menampilkan deret bil ganjil dan jumlah deret

               total = 0

               proses literasi :

i	i%2=1	cetak i	total=total+i
1	Ya	ya	1
2	Tdk	tdk	-
3	Ya	ya	4
4	Tdk	tdk	-
5	Ya	ya	9
6	Tdk	tdk	-
7	Ya	ya	15
8	Tdk	tdk	-

              

               Deret = 1,3,5,7

               total = 16

               Pilihan à 2 proses menampilkan deret fibonaci

               a = 1, b =1

               d = N-2

               cetak a dan b

               proses literasi :         

d	d>=1	a	b	c	Catak c
6	ya	1	1	2	Ya
5	ya	1	2	3	Ya
4	ya	2	3	5	Ya
3	ya	3	5	8	Ya
2	ya	5	8	13	Ya
1	ya	8	13	21	ya

               Deret = 1,1,2,3,5,8,13,21

Source code

import java.io.*;

class soal1

{

                    public static void main(String[] args)throws Exception

                    {

                                DataInputStream input = new DataInputStream (System.in);

                                System.out.print("masukkan nilai = ");

                                String snilai = input.readLine();

                                int nilai;

                                int total=0;

                                nilai = Integer.parseInt(snilai);

                                System.out.println("menu pilihan = ");

System.out.println("\t1.menampilkan deret bilangan ganjil dan \n  \t  dan menghitung jumlah seluruh deret yang ditampilkan");

                                System.out.println("\t2.menampilkan deret fibonaci");

                                System.out.print("masukkan pilihan anda = ");

                                String spilihan = input.readLine();

                                int pilihan = Integer.parseInt(spilihan);

                                switch(pilihan)

                                {

                                                case 1:

                                                                int i;

                                                                for(i=1;i<=nilai;i++)

                                                                {

                                                                                if(i%2==1)

                                                                                {

                                                                                                System.out.print(+i);

                                                                                                System.out.print("\t");

                                                                                                total=total+i;

                                                                                }

                                                                }

                                                                System.out.println();

                                                                System.out.println("total nilai deret diatas adalah = "+total);

                                                                break;

                                                case 2:

                                                                int a = 1;

                                                                int b = 1;

                                                                int c;

                                                                System.out.print(+a);

                                                                System.out.print("\t");

                                                                System.out.print(+b);

                                                                System.out.print("\t");

                                                                int d=nilai-2;

                                                                while(d>=1)

                                                                {

                                                                                c=a+b;

                                                                                a=b;

                                                                                b=c;

                                                                                System.out.print(+c);

                                                                                System.out.print("\t");

                                                                                d--;

                                                                }

                                                                break;

                                                default :

                                                                System.out.println("pilihan yang anda masukkan salah");

                                                                break;

                                }

                    }

}