2 nd Semester Module1 Introduction to Computer and Programming อภิรักษ์ จันทร์สร้าง Aphirak Jansang Computer Engineering Department Kasetsart University, Bangkok THAILAND

1 st Semester Outline  Introduction to Computer  How to run program?  Programming Languages

1 st Semester Do you know? THAILAND  How many computers in THAILAND? *

1 st Semester How can we classify computers?  Personal Computer Desktop Computer Notebook PDA – Personal Digital Assistant  Supercomputer  Mainframe High Computation Power

1 st Semester Computer Components  Input Devices  Output Devices  Computing & Processing Unit

1 st Semester CPU Main Memory Input Devices HD Secondary Memory Output Devices Computer Components

1 st Semester Computer Memory  1.Main Memory  2.Secondary Memory

1 st Semester Main Memory  Can be devided into 2 Categories RAM (Random Access Memory) ROM (Read Only Memory)  Memory Cell -> Byte -> Bit  1 Byte = 8 bits

1 st Semester Secondary Memory  Floppy disk  Hard disk  CDROM  DVDROM Etc… 1 Kbyte = 2 10 = 1024 bytes 1 Mbyte = 2 20 = 1,048,576 bytes 1 Gbyte = 2 30 = 1,073,741,824 bytes

1 st Semester Main Memory VS Secondary Memory  Main Memory Much faster More expensive Volatile  Secondary Memory Slower Less expensive Permanent

1 st Semester Do you know ASIMO? *

1 st Semester Outline  Introduction to Computer  How to run program?  Programming Languages  Introduction to Pascal Language

1 st Semester How to run program?  After boot Process May be Windows XP (Operating System: OS) has been loaded into Main Memory  User tell OS to load program P1  OS Load program P1 from Secondary Memory into Main Memory  OS run program from Main Memory

1 st Semester Outline  Introduction to Computer  How to run program?  Programming Languages

1 st Semester Programming Languages  Machine Language  Assembly Language  High-Level Language

1 st Semester High-level VS Assembly VS Machine Language  High-level Language SUM := A * 2 + ALPHA/3;  Assembly Language MULL3A, #2, R6 DIVL3#3, ALPHA, R7 ADDL3R6, R7, SUM  Machine Language

1 st Semester High-Level Languages  Procedural Language Fortran Cobol Basic C Pascal  Object-Oriented Language C++ Java C# C#  Functional Language Lisp  Logic Language Prolog

1 st Semester How to execute program from non-machine language?  Interpretation Method  Translation Method

1 st Semester Interpretation Method Process Interpreter (on computer) Output Source Program Input

1 st Semester Translation Method Process Translator (on computer) File *.exe Source Program Input

1 st Semester Translators  Assembler (assembly)  Compiler (High-level language)

1 st Semester Quiz1 What will happen to you when our world have no computers?

1 st Semester Summary  Computer Basic  Programming Language Interpreter Method Translator Method