Architecture Diagram Explanation

Input Devices:

Microphone, trackpad, camera, phone, scanner, USB

Output Devices:

Monitor, speaker, printer, projector, USB

Program [stored in Random Access Memory (RAM)]

Ask students for name, score
Save the name and score
Add scores
Save scores in sum
Calculate Average
Save Avg
Print...

RAM

Volatile Memory

When the power is off, everything that is stored in RAM, is erased

Temporary

Central Processing Unit (CPU)

Control Unit (CU)

Sees through the execution of line by line statements of the program

Arithmetic Logic Unit (ALU)

Logical deduction

If Avg is greater than 90, then...

Evaluates logical statements

Comments

Software Approach, Top Down Design

One way of coding is to simply have a rough idea of what you want to do and then start typing away to produce one huge source file. This is a very bad idea. The resulting code is likely to have many issues with it that include: Poorly documented code, so very hard to maintain and update 'Spaghetti Code' - which means a tangled mess of jumps and loops all over the code, very hard for someone to understand. Even by the originial coder a few days later! Duplication of code, so wasting memory and running speed Very hard to develop by more than one person as there is only one file Very hard to debug - the file either works of it doesn't

Systems Thinking

What comes to your mind when you hear the word, system? Gears and settings icon Small error can have a large impact and effect the outcome (different than expected) What is a system, and how does it work? A system is an orderly and efficient process where tasks are completed. A system works similarly to an assembly line.

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