1. Computer Programming 2 Lecture 2: Advanced Array Data Structure Using Methods Prepared & Presented by: Mahmoud Rafeek Alfarra MINISTRY OF EDUCATION & HIGHER EDUCATION COLLEGE OF SCIENCE AND TECHNOLOGY (CST) KHANYOUNIS- PALESTINE

2. و من يتقِ الله... ذكر معروف الكرخي عن بكر بن خنيس رحمهما الله قال : كيف يكون مُتَّقِيًا مَنْ لا يَدْرِي مَا يَتَّقِي Mahmoud Rafeek Alfarra 2 Downloaded from http://staff.cst.ps/mfarra شريحـة ثابتـة لعلنا نحسن من خلالها أخلاقنـا و أفعالنا لنفوز يوم الامتحان الحقيقي

3. Out Lines Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 3 Revision about Methods in Java Example: Search in 2-D Array X O Project.

4. Revision about Methods in Java Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 4 Three kinds of modules exist in Java methods, classes and packages. Methods (called functions or procedures in other programming languages) allow the programmer to modularize a program by separating its tasks into self-contained units.

5. Revision about Methods in Java Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 5 To Create Method: Access modifiers returned_type Method_name (Type par1, Type par2, … ) control access to a class's variables and methods. The value which the method will returned The name of method with the rules of identifiers The arguments which the method needs to perform its task

6. Example : Method accepts and return Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 6 Method return true if the parameter x is available in in array Names else return false. Method Array wanted True/false

7. Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 7 import javax.swing.JOptionPane; import java.math.*; public class Searchnumbers { public static void main(String[] args) { String input; int num [] = new int [10]; boolean flag= false; for (int i=0; i<5; i++) { input = JOptionPane.showInputDialog("Enter another number"); num[i]= Integer.parseInt(input);} input = JOptionPane.showInputDialog("Enter the wanted value"); int wanted = Integer.parseInt(input); int j; for ( j=0; j<5; j++) { if (num[j]==wanted) { flag = true; break; } } if (flag == true) JOptionPane.showMessageDialog(null,"the value is existed at cell "+j); else JOptionPane.showMessageDialog(null,"the value does not exist"); } Solution without using Methods

8. Example : Method accepts and return Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 8 In the last example: 1. Set the type of array as string 2. Re-programming it using Methods

9. Practice Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 9 Write a program to simulate the Attendance status for 10 students’ names (fname, laname), in 5 days for each student. Write a program to simulate the Attendance status for 10 students’ names (fname, laname), in 5 days for each student. Write a methods to: Write a methods to: 1. Calculate the sum of absent for each student. 2. Return the name of student who have the max number of absent days. 3. If the attendance of one day have 2 marks, print the marks for each student.

10. X O Project Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 10 Using Procedural programming, 2-d array, Write a program to simulate the XO game between user and computer.

11. Next Lecture … Mahmoud Rafeek Alfarra Downloaded from Downloaded from http://staff.cst.ps/mfarra 11 Method in depth