help a lost soul
Rowan Corben
rowan@corben.fslife.co.uk
Fri, 1 Mar 2002 00:52:51 -0000
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sir,
i have been set an assignment by my university....we are so badly taught =
that i have absolutley no idea how to do it! I would be more than happy =
to post payment for however much you feel your time is worth...
Please,please help:
ex.1) Extend to the library database to include category of loan for =
overnight + 4 week loans-you should use the following data types.The =
TIME and DATE are the due time and date for books.You should provide =
enough data to reasonably test your code.
data LoanType =3D Overnight Date Time | FourWeek Date
deriving (Show,Read)
data Time =3DTime (Hours,Minutes)
deriving (show,Read)
data Date =3DDate (Year,Month,DayNum)
deriving (Show,Read)
type Hours =3D Integer
type Minutes =3DInteger
type Year =3D Integer
type DayNum =3DInteger
data Month =3D =
January|Februrary|March|April|May|June|July|August|September|October|Nove=
mber|December
deriving (Eq,Ord,Enum,Show,Read)
overdue books are fined at the following rates:
OVERNIGHT the due time is 24 hours from the time borrowed to the nearest =
hour above (for example,a book borrowed at 12.35 would be due back at =
13.00 the next day).Overdue books are fined at 0.1p per minute rounded =
to the nearest penny.
FOURWEEK the due date is four weeks from the borrowing date.Overdue =
books are fined at 10p per day
ex.2) To calculate fines you will need to impliment functions over =
DATE and TIME.You will also need a data type to represent time periods:
data TimePeriod =3D TimePeriod (Days,Hours,Minutes)
deriving (Eq,Ord,Show,Read)
type Days =3D Integer
*afterTime which takes two times and returns True if the first is =
after the second.
*beforeTime which takes two times and returns True if the first is =
before the 2nd =
=20
*timeBetween which takes two times and returns the time between the =
first and the 2nd
*timeIncr which takes a time and a time period and returns a new time =
(time should be represented as a 24 hour clock
*timeTo24String which takes a tim eand displays it as a string in =
24hr format
*timeTo12String which takes a time and displays it as a string =
in 12 hour format
ex.3) Make DATE and TIME instances of the type classes Eq and Ord
ex.4) For overnight books most fines are on the same day-write a =
function that takes a book and a time and calculates the fine on the =
book (assuming it is returned on the due date but after the due time).
If you could help i will be extreamly =
gratefull!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
haskinsgreg@hotmail.com =20
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<DIV><FONT face=3DArial size=3D2>sir,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>i have been set an assignment by my=20
university....we are so badly taught that i have absolutley no idea how =
to do=20
it! I would be more than happy to post payment for however much you feel =
your=20
time is worth...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Please,please help:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>ex.1) Extend to the =
library=20
database to include category of loan for overnight + 4 week loans-you =
should use=20
the following data types.The TIME and DATE are the due time and date for =
books.You should provide enough data to reasonably test your =
code.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>data LoanType =3D Overnight =
Date Time |=20
FourWeek Date</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2> &nbs=
p;  =
; =20
deriving (Show,Read)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>data=20
Time =3DTime=20
(Hours,Minutes)</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2> &nbs=
p;  =
; =20
deriving (show,Read)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>data=20
Date =3DDate =
(Year,Month,DayNum)</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2> &nbs=
p;  =
; =20
deriving (Show,Read)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>type=20
Hours =3D Integer</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>type Minutes =20
=3DInteger</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>type =
Year =20
=3D Integer</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>type DayNum =
=3DInteger</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>data Month =3D=20
January|Februrary|March|April|May|June|July|August|September|October|Nove=
mber|December</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2> =
deriving=20
(Eq,Ord,Enum,Show,Read)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>overdue books are fined at the =
following=20
rates:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>OVERNIGHT the due time is 24 hours from =
the time=20
borrowed to the nearest hour above (for example,a book borrowed at 12.35 =
would=20
be due back at 13.00 the next day).Overdue books are fined at 0.1p per =
minute=20
rounded to the nearest penny.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>FOURWEEK the due date is four weeks =
from the=20
borrowing date.Overdue books are fined at 10p per day</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>ex.2) To calculate fines =
you will need=20
to impliment functions over DATE and TIME.You will also need a data type =
to=20
represent time periods:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2> data=20
TimePeriod =3D TimePeriod (Days,Hours,Minutes)</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2> &nbs=
p;  =
; =20
deriving (Eq,Ord,Show,Read)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> type=20
Days =
=3D=20
Integer</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial =
size=3D2>*afterTime which=20
takes two times and returns True if the first is after the =
second.</FONT></DIV>
<DIV><FONT face=3DArial =
size=3D2>*beforeTime which=20
takes two times and returns True if the first is before=20
the 2nd &=
nbsp; &n=
bsp; &nb=
sp; &nbs=
p;  =
; =
</FONT></DIV>
<DIV><FONT face=3DArial =
size=3D2>*timeBetween which=20
takes two times and returns the time between the first and=20
the 2nd</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>*timeIncr which takes =
a time and=20
a time period and returns a new time (time should be represented as a 24 =
hour=20
clock</FONT></DIV>
<DIV><FONT face=3DArial =
size=3D2>*timeTo24String =20
which takes a tim eand displays it as a string in 24hr =
format</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>*timeTo12String =
which=20
takes a time and displays it as a string in 12 hour format</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>ex.3) Make DATE and =
TIME=20
instances of the type classes Eq and Ord</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>ex.4) For overnight =
books most=20
fines are on the same day-write a function that takes a book and a time =
and=20
calculates the fine on the book (assuming it is returned on the due date =
but=20
after the due time).</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>If you could help i will be extreamly=20
gratefull!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</FONT></DIV>
<DIV><FONT face=3DArial=20
size=3D2>haskinsgreg@hotmail.com  =
; =
&=
nbsp; =20
</FONT></DIV></BODY></HTML>
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