Objective-C Tutorial - Lesson 13: Part 2: Extending Your Program Video Lecture | Learn and Understand: Objective C (English) - Web Development

now the first thing we're going to
change is since we're going to be using
this for many different countries we
want to change euro transaction to
exchange transaction so it's more
universal and then the next thing is I'm
going to put in Europe and then I
already added England earlier now we
will need to change these function
prototypes here I've already changed the
one but I haven't changed the other so
budget and then either budget so lets us
have access to either one and then you
want to change this to double foreign
currency to make it universal as well
now we move down here to vacation budget
and then the exchange rate well since
it's now the Europe vacation budget we
need to change that and as well down
here and then when you get to a number
dollars you want to put number dollars
in Europe and then number euros can stay
the same now we're going to be adding
the different ones for England so dot
exchange rate and that's let's say 1.5
and then we'll be vacation budget
England
the budget and let's say we have two
thousand dollars and the budget for
England and then double number dollars
in England equals 100 and another double
number pounds and that will also be 100
okay now we're moving down from kind of
all the declarations of all the numbers
into where we delegate apps on their
responsibility to the functions and the
NS logs so the first one it used to just
be numbered dollar or spend dollars
number dollars but now it's spend
dollars and then you have the vacation
budget except we do need to add you're
up to it because it is now the budget
for Europe and then we have need to
change it for number of dollars in
Europe
no when it's anas log converting US
dollars from budget of a thousand and
two euros leaves then we want to make
sure that it says number dollars in
Europe and that the vacation budget
Europe now this first part is just
changing it to make it more extendable
and then when we start adding like all
this stuff when you add England it's
actually pretty easy but it's just kind
of annoying now because you got to go
back and change some of the names
because it wasn't very extended it
wasn't very Universal the first time we
built it so now we can move on down to
charge foreign currency because you
don't want that to be euros any more so
you change that to foreign currency and
I actually forgot something up here you
want to change this to foreign currency
as well because like i said earlier want
to make it all very universal so then
you also want to give the address for
vacation budget for europe and then you
have number of euros okay and then the
NS log afterwards it's number euros and
then vacation budget and make sure it
says europe europe and the budget so
that is all correct okay let's move on
to England now
so we will declare spend dollars and it
is going to be vacation budget England
and then the next part will be number
dollars in England and close that I
would semicolon and then the NS log will
be converting % top to F US dollars from
a budget of 200 did I do something wrong
there whoops there we go okay from
budget of 2000 in two pounds leaves % to
F then close it out with your quotation
marks okay now we're going to end it off
with number dollars in England and then
a vacation budget England dot the budget
so then we will go to charge foreign
currency we will be using vacation
budget the England and then number
pounds
and a slog now charging % 2f pounds
leaves dollar sign % dott 2f quotation
comma number pounds and vacation budget
England dot the butt so there we go now
we should be all done with Maine and I'm
praying that I didn't mess up because
that was quite a bit of code that we did
there hopefully I won't get any errors
but let's move on down okay so we did
have a very simple little spend dollars
are spent dollar function and it's still
fairly simple but we did add in the
pointers so we've pretty much done all
the modifying for the first one there we
have either budget then we have duller
double dollars and we have the little
pointing deference operator there so
we're pretty much all done for that one
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