Need help with a program pleasee

hi all,
i need help with a program please. here is my problem:
a certain self-paced coiurse is divided into 5 logical units,with the 5th one being an extra credit unit.a student may take up to 3 such quizes for each unit.all quiz scores are recorded as percent correct.
a unit average score is determined by dividing the
score total for the unit by the # of quizzes taken on that unit.a course average is calculated by finding the average of the unitaverage-total of all averge divided by the #of units completed(could be none).this is then adjusted if fewer than 4 units are completed-15%points less for each unit short of 4.If the 5th unit is completed,the coiurse average is adjusted by adding 10 %points.All course averagres are further adjusted so they don't fall below 0 nor above 100.-1 was recorded ed to mark the end quiz score pertaining to single unit.A 999 marks the end of the units completed by a particular student.

will want to use loop within a loop to handle processing the possible several quizes within possible several units.

Here is part of data that would be helpful in programming.

"Charleston"
75, 60, 85, -1
90, 80, -1
80, -1
65, 75, -1

999
"Davis"
60, 80, -1
90, -1
85, -1
999

Hopefully someone will be able to help me out here.
i need source code for how to start this problem.
thanks a lot .
i would really appreciate it.