hossam-khalaf / programming-fundmentals

Programming fundmentals

Represent numbers

• unary 0 , 1
• 0 0 0 => 0
• 0 0 1 => 1
• 0 1 0 => 2
• 0 1 1 => 3
• 1 0 0 => 4
• 0 0 0 0 0 0 0 1

Transistor => on off true false

Represent text - letters (A, b , C ...)

• ASCII every letter represented by a number H I ! 72 73 33 01001001 0011001 011011100

Algorithms خطوات حل المشكله

• codes [XX]
• pseudocode
• • problem is => call a person from phone book
• قبل ما اكتب اى اكواد , يجب علينا التفكير فى خطوات حل المشكلة باللغة العادية

(verb) فعل = function [conditional] = if & else {Boolean} = true & false

steps

1. (pick up) phone book
2. (open to) middle of the phone book
3. (look) at the page
4. [if] {person => variable-- is on the page}
5. (call) the person
6. [else if ]{ person is in the left middle of the book}
7. ( go back) to line 3 => loop
8. [else if] {person is in the right middle of the book}
9. (go back) to line 3 => loop
10. [else]
11. (Quit)