Foundations of Programming and Problem Solving

Introduction

Outlines– Course overview– Teaching style– Assessment– Course information and support– About me– About you– What is a computer programming language?– Different programming languages– Machine code– Assembler– C– Java– PHP– Python

– What is Java?

Course overview

At the end of this course, you will be able to:• Write, compile, debug, test and execute computer

programs using Java• Use variables to store a program's state• Process numbers with arithmetic operators• Use loops and logic to control a program• Define methods which process data• I Define classes and use objects(may be!)

Teaching style

• Lectures (2 hours)• Labs (2 hours)

Assessment

• Programming assignment 1: 15%• Programming assignment 2: 15%• Programming assignment 3: 15%• Presentation: 10%• Problem solving assignment: 15%• Exam 30%

Course information and support

• Office hours (Monday 11am-12pm) • Course material:• http://www.doc.gold.ac.uk/~mas01lo/course/2012-2013/foundation/lectures.html

• Or learn.gold• The problem solving part will be in learn.gold

About me

• Lahcen Ouarbya• Room 6, 29 st-james• Email: l.ouarbya@gold.ac.uk• Website: www.doc.gold.ac.uk/~mas01lo• Tel: 020 7717 2263

About you

Turn to the person next to you and ask each other the following questions:

• Have you used a computer program before?• Which ones (name 2)?• Which problem(s) did you solve with the program?• What type of information did you work with?• What is a computer program?• Now tell the class what your partner said

What is a computer programming language?

Again, in the same pairs, answer these questions:

• Name a computer programming language• Have you used a computer programming language

before?• which ones?• What have you used them for?• What is a computer programming language?• Now tell the class what your partner said

Different programming languages

• Machine code• Assembler• C• Java• PHP• Python

Machine code

Assembler

Add $r1, $r2, $r3Sub $r3, $r4, $r5

C

#include <stdio.h>main(){printf(Hello world!\\n);}

Java

class Test { static void main() { System.out.println(Hello world); } }

PHP

<? echo ("Hello world!");?>

Phyton

print("Hello world!")

Java

• An object orientated programming language• A high level, human readable language• A cross platform language• 'Write once, run anywhere'

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Software Development Tools• We will use a combination of the Dr Java IDE and

the Sun Java SDK

SourceFile(s)(.java)

Programmer

Dr Java IDE

Compiler(javac)

ClassFile(s)(.class)

VirtualMachine

(java)

Edit Build Run

Programexecutes

Parts of Sun Java SDK

Graphical User Interface

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Program Development Steps

Edit and save source code

Build source codeto create program

Run program andevaluate results

Errors

Errors

• Classical “Waterfall” Development Steps

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Styles of User Interface

• Graphical User Interface (GUI)– Computer displays a combination of text and

graphical symbols offering options to the user– User manipulates mouse and uses keyboard to

select from the offered options (“hot keys”) or to enter text

– More common now (computer power is cheap)– Considered by most to be “user friendly”– Examples: M/S Windows/Office or MAC O/S

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Software Development Tools• Using Sun Java SDK alone

SourceFile(s)(.java)

Programmer

Compiler(javac)

ClassFile(s)(.class)

VirtualMachine

(java)

Editor

Programexecutes

Parts of Sun Java SDK

Command Line Interface

First Java ProgramHelloWorld.java

public class HelloWorld {

public static void main(String args[]) {

System.out.println("Hello World");

}

}