Due dates:

>>You must turn it in with the turnin program
  from your account for this class by midnight
  at the end of the day Sunday Oct 13. (If you
  miss that deadline, you can turn it in up to 
  24 hours late, but with a penalty.)

>>You must complete an interview for assignment 2
  by the end of the day Friday October 18.
  Note that there is no grace period on the
  interview deadline. Also note that there are no proctors
  in the labs Friday after about 6pm.

Modified on October 4, 1996
READ THE WHOLE FILE AND DO SO CAREFULLY.

You can work on this as soon as you want, but
  1. Do the reading in the Savitch text 
      if you are working ahead
  2. DO NOT TURN THIS IN WITH THE turnin PROGRAM BEFORE
     8 AM SATURDAY, OCTOBER 5. If you finish before then, just
     wait a few days to turn it in. Also, check for
     changes before turning it in.

CSE 9A  UCSD Fall, 1996
Assignment 2
Due date: To be announced

Reading: Chapters 1 and 2 and Section 3.2 of
         Chapter 3, all in the Savitch text

Programming: Programming project 8 on page 98 (Chapter 2).
You may work in teams of two people
on this; the two team members do not have to
be in the same section. You may work alone
if you prefer.


Details:
>The first payment is due one month after the date
 of purchase. If you make N payments and after
 N payment, your balance is zero, then we will
 say it takes N months (not N+! months or anything
 else).

>Use the const modifier to create names for
 each of the following constants:
 interest rate (you may wish to use the monthly rate.)
 purchase price
 monthly payment amount

>IMPORTANT ADDED DETAIL:
>One reason for using the const modifiers is so
 that you can later change any or all of the values
 for the interest rate, purchase price, and/or
 monthly payment. (This does require that you
 recompile.) However, for some values of these
 constants, the loan will never be payed
 off. If the payment is less than or equal to the
 monthly interest, the loan is never payed
 off and the program might have an infinite loop.
 Include a check that will end the program and
 write out a warning if the loan will never
 be paid off. The file hw02v2.o contains object
 code for a version of the program with the
 purchase price changed to $4000. This loan 
 would never be paid off.
(The file hw02.o has object code for the version
you will turnin.)

>Note that you cannot uses fractions of pennies in 
 this accounting. If the interest due is $14.573
 then you are charged $14.58 in interest.
 Note that it is raised to the next full penny
 and not simply rounded. This makes calculating the
 monthly interest a little bit tricky.

Suppose the monthly interest rate is given by:
    const double rate = 0.015;//Monthly interest rate as a fraction
The monthly interest should be balance*rate.
But balance*rate may include a fraction of a penny.
The following expression will change any fraction of a penny
to a whole penny:

  monthly  interest = (ceil(balance*rate*100))/100.0;
You can use this formula without understanding it,
but it is easy to explain.
    suppose balance*rate is 14.573
then 
    balance*rate*100 is 1457.3
ceil is the "ceiling function" which
takes any fraction and moves it to the
next whole number, so
     ceil(1457.3)  is 1458
     1458/100.0 is 14.58
So, this changes 14.573 to 14.58 as desired.

>You will need to put the following at the top of
your file in order to use the ceil function:
#include <math.h>
you put on a separate line right next to
#include <iostream.h>
(Note that this is all you need to do with CC
compiler. With the g++ compiler you need to do
more. If you want to try the g++ compiler see
the file g++.math in the public directory.)

>Be sure to use the "magic formula" (pp 50-51) to
 output dollar amounts in a nice format.

>Be sure to include a comment at the top
 similar to the one on p.89.

>Be sure to follow the style of the programs
 in the Savitch text.