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Chapter 1-a

FLOW CHART

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BACKGROUND Program :

composed by 1 programmercomposed by 1 team of programmers

Required planning & design using:

FlowChart:Symbols representing the flow ofcontrol steps of a programs execution

Objective: to simplify program-code composition

FLOW CHART

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SYMBOLS IN FLOW CHARTSymbol for presenting

data/input orresults/output

Process

flow/direction

Symbol for results

documentation(in hard copy)

Symbol for readingdata/input usingpunched cards.

Symbol of a process or

program statement

Start and End of aprogram indication

Connector

Symbol forconditional statement

where decision isbased of whether thecondition is true orfalse

yn

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TYPES OF INSTRUCTION

Process A

Process B

Process C

A. Unconditional Statements

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TYPES OF INSTRUCTION

B. Conditional Statement

Condition

Process A Process B

False True

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TYPES OF INSTRUCTION

C. Looping Statements

Condition

Process A Process B

False True

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EXAMPLE:1. Flow chart for buying cakes using coupons:

Start

Prepare Money

Queue forbuying coupon

Buy theCoupon

A

Choose Cake

Trade cake

for coupon

Stop

A

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EXAMPLE:2. Flow Chart for Study:

Start

PrepareEquipments

Read Notes

Understand

Notes

A

Do theQuestions

Match with

Answers

Stop

A

UnderstandContents

Fit?

Take a break

B

B

yes

no

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EXAMPLE:2. Flow Chart for Study:

Mulai

PersiapkanPeralatan

Membaca materi

MemahamiMateri

A

Mengerjakan

Soal

Cocokkandengan Jawaban

Selesai

A

Memahami isi

Sesuai?

Istirahat

B

B

ya

tidak

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EXAMPLE:3. Find the average of 3 input data numbers:

Start

X = A+B+C3

Stop

Read: A,B,C

Write: X

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PRACTICE QUESTIONS

1. Given:

A number of data

The amount of data depends on the numberof inputs that may varies.

Solve for :The Average of all data

2. IF A is a negative number, add 3 to XIF Not, subtract 3 from X

(Do it in Classroom)

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Answer 1: Start

TTL = 0, CNT = 0

TTL =TTL / CNT

WRITECNT, TTL

Stop

CNT = CNT+ 1

End of Data

Write: X

yes

No

Read: X

TTL = TTL + X

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Answer 1: Start

TTL = 0, CNT = 0

TTL =TTL / CNT

WRITECNT, TTL

Stop

CNT = CNT+ 1

Write: X

yes

No

Read: X

TTL = TTL + X

X = 9999

?

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Answer 2: Start

X = X + 3

A 0 ?

Write: X

yes

no

Read: A, X

X = X - 3

Stop

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Latihan Soal

1. Menampilkan bilangan 1 s/ 10

2. Menentukan apakah data yang

dimasukkan adalah bilangan positif atau

negatif

3. Menentukan apakah data yang

dimasukkan adalah bilangan genap atauganjil

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Latihan soal

4. Tampilkan deret :

-11, -9, -7, -5, -3, -1, 0, 2, 4, 6, 8, 10

5. Tampilkan deret :

-10, 8, -6, 4, -2, 0, 1, 4, 9, 16, 25

6. Tampilkan deret :0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55

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Soal latihan

1. Buatlah algoritma untuk menghasilkan deret :

-10, 8, -6, 4, -2, 0, 1, 3, 6, 10, 15, 21

2. Buatlah algoritma untuk menghasilkan deret :

-13, 11, -9, 7, -5, 3, -1, 0, 1, 4, 9, 16, 25, 36, 49

3. Buatlah algoritma untuk menghitung rata-rata,

nilai maximum dan minimum dari nilai ujian

Basic Computing