Program 2: CPS 008, Spring 1995
                      Owen Astrachan
               due: Part 1: February 9, 8:00 am, 
             Part 2: February 16, 8:00 am: 20 points




**********Introduction

This assignment covers material through chapter 4 of the text.  

In order to do this assignment you should create a subdirectory named
prog2 in your cps08 directory (see the first Unix/Emacs/C++ lab if you
haven't yet created a cps08 directory).  You'll need to copy a few files
into this directory to facilitate writing the programs for this
assignment.  You should do the assignment on mentor if possible, but
acpub machines will work too.  Follow the steps below to copy files:


Change into the prog2 directory using the cd command (use mkdir to
create the directory if you need to).  Verify that you're in the right
directory using the pwd command (print working directory).

Type cp  ~ola/cps08/prog2/* . which will copy all the files
from the directory  ~ola/cps08/prog2 into your directory.  Don't
forget the trailing period, or dot.  If you do, you might get an error
message something like: Permission denied.


This should copy at least two files

Makefile
userando.cc


Verify that these file(s) have been copied by typing ls to see all
the files in the current directory.

Programs to write

The first program you write should serve as a quiz in arithmetic for
someone studying multiplication and addition.  Name the program 
numquiz.cc.  The user should have the option of choosing easy, medium,
and hard problems.


   o  Easy means addition of two-digit numbers with no carrying and
      multiplication of single-digit numbers.


   o  Medium means addition of two or three digit numbers (carrying is ok) and
      multiplication of a two-digit number by a single-digit number.


    o  Hard means addition of three or four digit numbers (again, carrying is
       ok) and multiplication of two-digit by two-digit or three-digit by
       one-digit numbers.



Your program should ask the user how many questions to ask.  It should
then give a quiz, keeping track of the how many questions are answered
correctly.  A user should be given two chances to answer a question.  If
both are wrong, the correct answer should be given.  At the end of the
quiz, a message indicating how well the user did should be printed.


Extra Credit

For extra credit (5 points), if the user gets the answer wrong the first
time you can offer the opportunity for ``help''.  Help means that some
of the digits of the answer are filled in (but not all).  For
multiplication you might want to fill in some digits of the intermediate
steps as well as the final answer (e.g., in multiplying ).

This problem is worth 20 points.  Grading is as follows:

    1.  program runs correctly in general: 10 points

    2.  user-interface is good (easy to read, use, etc.) and
        program is robust (doesn't do bizarre things for bad input): 4 points

    3.  program is well-designed and implemented: 6 points


To earn full credit on design, there should be no function longer than
approximately 25 lines of code (not including comments) and duplication
of code should be minimized.  Be sure to ask questions about this in
class or via news.

You'll need to use either "dice.h" or (and better)
"rando.h".  The header for the latter is attached as part of this
document with a program that uses it.

********  Submit

You should create a README file as described for the first
assignment.  In it you put the time you spent on the assignment, the
names of people with whom you collaborated, and any thoughts on the
assignment.  To submit, use

    submit08 prog2 README numberquiz.cc


The README file is worth 2 points.