Pengantar Logika : Kerancuan Berpikir dan Jenisnya

Pemodelan untuk Komputasi : Modularization dan Contoh Soal ( Bahasa Inggris )

Introduction

Modularization is a vital element of programming. It allows us to define new computable actions by assigning a name to some process. Algorithms can be modularized by breaking them into independent subprocesses.

Example: to calculate the volume of a cone, there are 2 subprocesses:

• Calculate the base area 
• Multiply: the base area with the height of cone and 1/3

Example: The Volume of A Cone

Module

A module is a named subprocess. Modules are vital when writing large programs that consist of many individual parts. Syntactic pattern for naming a subprocess as a module: 

Parameters are the input of the subprocess/algorithm.

Example: The Volume of A Cone

Invoking A Module

To invoke a module, mention the name along with the parameters. So, the statement baseArea(10) will calculate the area of circle with radius = 10. The result is 314. Example :

Example: Vowel

To count how many vowel in a word, there are 2 subprocesses:

1. A: Check if a letter is vowel
2. B: Do subprocess A for all the letters in the word

The statement ltr('a') will check if a is a vowel. The statement ltr('v') will check if v is a vowel

Example: Fraction 1

Write a module to compute the addition of two fractions.

Example: Fraction 2

Write a module to compute the addition of two fractions.

Exercises

1. Write a module to transform a fraction to its simplest form !
2. Write a module to transform a point. The transformation is including:
• Translation 
• Dilation 
• Reflection from the origin
3. Write a module to find the closest pair of points ! 
4. Write a module to swap the values of two variables ! 

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