Big Idea 1 CSP

computing innovation

includes a program as an integral part of its function

physical computing innovation examples

self-driving car

nonphysical computing software

picturing editing software

nonphysical computing concept

e-commerce

hardware

physical components of a computing device

software

instructions in a programming language to the computing device (program)

moore’s law

predicts the size of transistors halves every two years while the cost also halves every two years.

function of program

how the program behaves during execution and is usually described by how the user interacts with it

purpose of the program

the goal or the motivation for writing a program

different purposes for writing a program

solving problems or pursue interests through creative expression or to provide entertainment

specification

the requirements for the program

what is a program

a collection of program statements that performs a specific task when run by a computer

code segment

a collection of program statements that are part of a program

incremental development

breaks the problem into smaller pieces and makes sure each piece works before adding it to the whole

iterative development

requires refinement and revision based on feedback, testing, or reflection throughout the process. may require revisiting earlier phases of the process

documentation

written description of the function of a code segment, event, procedure, or program and ow it was developed

positives of documentation

explains how the software is built and how to use it

makes it easier for users or future developers to understand the software

good for collaboration

what are comments a form of

documentation

syntax error

when the code does not conform to the rules of the programming language

what does it mean if an error is in compile time

the program would not start to run unless the errors are fixed

runtime error

when the program attempts an operation that is impossible to carry out

logical error

occurs when the program runs without crashing, but gives a wrong result

test cases

defining specific inputs where the expected output is known

hand tracing

going through the code step by step to understand what it does with given inputs.

visualizations

using diagrams to represent execution of code

debuggers

executing code step by step and inspecting variables