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Central Processing Unit

What's a Computer?. Monitor. Central Processing Unit. Disk. Main Memory. mouse. Keyboard. Network. can do very simple tasks VERY FAST. add, write in memory. CPU: (stupid) brain of the computer. Goal: Perform elaborate tasks by putting together many simple tasks. HOW ?.

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Central Processing Unit

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  1. What's a Computer? Monitor Central Processing Unit Disk Main Memory mouse Keyboard Network can do very simple tasksVERY FAST add, write in memory... CPU: (stupid) brain of the computer Goal: Perform elaborate tasks by putting together many simple tasks HOW ? 110-A1

  2. Write a program! But A computer only understands instructions written as a series of 0’s and 1’s Could write as such, TIME CONSUMING... MACHINE LANGUAGE BETTER High level language close (but ) to plain English • To solve a specific problem: weather forecast, payroll, word processing, traffic lights... Need a compiler to translate our program into 0’s and 1’s 110-A2

  3. Which language? What we will use BUT You will learn programming VB is not the point A useful skill valid for any language Examples of High level languages: • FORTRAN, LISP… 50’s (scientific) • COBOL… 60’s (business) • BASIC, PASCAL, C… 70’s (multipurpose) • C++ (OOP), VB (Objects + events) …80’s • Java,… 90’s (platform independent) • C#, VB.NET… 2000’s (OOP + event driven) An "easy" and powerful language 110-A3

  4. How to write a program Logical series of tasks Example: Managing a traffic light Check the time How long has it been since the light has changed? No Yes • Clearly specify the problem • Analyze the problem • Find an algorithm to solve the problem Long enough? Change the light • Write the program (use VB). • DOCUMENTATION • Test and Debug (correct mistakes) • Maintain and Update 110-A4

  5. What to Expect? * Programming is FUN DO NOT FALL BEHIND plenty Rewards: • Open doors in • Education: Engineering, Computer Science, Physics, Bio technologies... * and sometimes frustrating • Read the book • Come to class • Get a lot of practice on the computers • And... • Employment: good programmers are still in high demand 110-A5

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