Extra Notes

Question 1

return vs void functions

Answer 1

use & sparingly, only use when you really need them

if you only need to return 1 value, just use non-void function

Question 2

char

Answer 2

for single digit inputs

eg. user inputs an answer “b” for an exam

Question 3

string

Answer 3

for multiple digit/char inputs

eg. user inputs their first name

Question 4

”” and ‘’

Answer 4

can use either single or double quotations for characters and strings

Question 5

partially filled arrays: prompting user

Answer 5

useful to write:

cout &laquo_space;“please write up to “ &laquo_space;DECLARED_SIZE &laquo_space;” numbers terminated with “ &laquo_space;SENTINEL;

Question 6

eg of program to square a sequence of numbers

Answer 6

1) initialise
2) cout request for input
3) readtosentinel() to read in inputs
4) use square_array() function which can use square() function
5) use print_array() function to print results

Question 7

functions and expressions

Answer 7

can put expressions into functions

eg. approx = newtonsqrt(n, n/2);

Question 8

efficiency using !

Answer 8

instead of:
while (function(x) = false)

you can write:
while (!(function(x)))
if function is a bool

Question 9

efficiency with if statements and bool returns

Answer 9

if (n%f == 0)
return true;
else
return false

can be shortened to:

return(n%f == 0);

Question 10

using constants like Pi

Answer 10

declare PI at start, ie.
const int PI/const double Pi = …..

then use as such:
area = d/2 * d/2 * PI;