COS220: INTRO TO COMPUTER SCIENCE I                 HOMEWORK 5


          
          
                            Splodges and Other Stuff
          
          Part  1  (2 points) (One or more programs to be modified and
          run from the online database of text programs) 
          
          a) Modify program F6-2 to handle pass, fail, AND  pass  with
             honors. Run it with your own test data. 
          b)  Run  program  F5-CBR (the data is included at the end of
             the file). 
          c) Modify program  F5-CBR  to  print  a  university  heading
             before  any data is printed, and a college heading before
             each set of college data is printed. 
          
          Part 2 (7 points) (A program to be designed and  implemented
          based upon specifications provided by the instructor) 
          
          PROBLEM: SPLODGE POPULATION EXPERIMENTS 
          
          A  team of scientists is conducting experiments on Splodges,
          microorganisms that double in  population  every  3  minutes
          unless  treated with the inhibiting agent TBA. Specifically,
          every three minutes the splodge population is known to  grow
          according to the following formula: 
          
                                POP := 2 * POP - TBA 
          
          where  TBA  represents  the  number  of drops of TBA applied
          during the period. 
          
          Obviously  if  no  TBA  is  ever  applied,  then  a  splodge
          population  will  double  in  size  until  it  overruns  the
          laboratory. On the other hand,  if  a  "bucket"  of  TBA  is
          applied,  we  can  "drown"  a  splodge  population before it
          causes problems. 
          
          You are to design a Pascal program to process  an  arbitrary
          number of splodge growth experiments. 
          
          
          EXPERIMENT INPUT: 
          
          The  input data consists of zero or more "experiments", with
          a negative integer marking the end of the "file". 
          
          Each experiment begins on a new line with an initial splodge
          population, followed by zero or more applications of TBA (to
          be applied in 3 minute intervals), FOLLOWED  BY  A  NEGATIVE
          INTEGER  MARKING  THE  END OF THE EXPERIMENT. The experiment
          ends when either the TBA runs out or the population  becomes
          zero  or negative. Note that there may be leftover TBA after
          the completion  of  an  experiment,  and  that  it  must  be
          accounted for. 
          
          Use  the following input data to test your program. You need


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          COS220: INTRO TO COMPUTER SCIENCE I                 HOMEWORK 5


          not type this data into your program file.  Just  copy  this
          homework file to a temporary file, delete every line in that
          temporary file except the data below, and then use the XEdit
          "get" command to insert the data into your program file. 
          
          10
          3 30 7 3 4 5 0 -1
          1
          1 1 1 1 1 -1
          1
          1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 
          1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 -1
          2
          0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1
          0
          2 3 2 3 -1
          20 
          -1
          -99
          
          Notice  that  the  first  experiment  begins  with a splodge
          population on a new line, continues with 7  applications  of
          TBA, and ends with a -1. There are six experiments in total,
          and the entire "file" is ended with a -99. 
          
          OUTPUT: 
          
          A report must be printed as follows: 
          
                         SPLODGE EXPERIMENTS
          
                     Initial    Final      Elapsed
          Experiment Splodge    Splodge    Time of    Used Unused
          Number     Population Population Experiment TBA  TBA
          ---------- ---------- ---------- ---------- ---  ---
              1
              2
              .
              .
              .
              n
          --------------------------------------------------------
          Total TBA Used  :
          Total TBA Unused:
          
          Note  that  the  calculated  final splodge population may be
          negative for a particular  experiment.  Simply  report  that
          negative  value (even if it makes a bit more sense to report
          a zero). 
          
          Note also that the elapsed time of an experiment is simply 3
          times the number of applications of TBA. For example, if  an
          initial   splodge   population  of  10  is  "drowned"  by  1
          application of 10000 drops of TBA, then the elapsed time  of
          the experiment is 3 seconds. 
          


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          COS220: INTRO TO COMPUTER SCIENCE I                 HOMEWORK 5


          IMPORTANT: 
          
          The  purpose  of  this homework assignment is to demonstrate
          the  power  of  the  while  statement.  Therefore,   NO   IF
          STATEMENTS ARE ALLOWED IN YOUR PROGRAM. 
          
          Part  3  (1  point) (A set of questions to be answered based
          upon the readings and programs from parts 1 and 2) 
          
          a) We can classify the splodge program as another example of
             the "control break" problem. Why? 
          b) What properties of while statements  allow  us  to  write
             complex programs without IF statements? 
          
          Part 4 (0 points, but highly recommended) 
          
          Make lots of controlled changes to your programs and observe
          their  effects.  DON'T HAND ANY OF THIS IN, but you may come
          to my office and discuss them with me. 







































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