Procedural Abstraction and Functions

Question 1

abstraction

Answer 1

in comp science: means identifying + naming something complex and then usin that name to refer to the complex thing

Question 2

data abstraction

Answer 2

eg. design a data structure to hold details about a bank account, call it bank_account

Question 3

procedural abstraction

Answer 3

eg. give name to piece of code that does something, use name to get that something done

Question 4

why use functions

Answer 4

• short name, less details on main
• easy to edit details as you have single point of editing
• single point of error-checking + debugging
• reusability

Question 5

procedural abstraction process

Answer 5

• give name to an algorithm
• use name to execute algorithm within another one

eg. sqrt(x) algorithm for computing sq root
sqrt(789.54)
apply aqrt procedure to 789.54

Question 6

procedural abstraction in C++

Answer 6

called functions in C++

Question 7

function

Answer 7

encapsulates + names an algorithm to solve a particular problem

Question 8

some built in functions

Answer 8

pow(i,n) (cmath)
sqrt(x)
fabs(x)
sin(x)
cos(x)

Question 9

role of functions

Answer 9

• hide detail
• increase readability
• allow reuse of code
• modular software development

Question 10

readability example

Answer 10

is_a_factor(n,d) more meaningful than

n%d == 0