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Problem 1 (15 points):  

Write a function called fix_grade that has two integers as parameters.
The function should add ten to the first parameter if the second
parameter is less than or equal to 18.

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Problem 2 (15 points):  

Write a function called check_grades that has two integers as parameters.
The function should return 2 if the first integers is at least ten greater
than the second integer, return 1 if the first integer is larger than the
second but less than ten larger, return 0 if the integers are the same,
and return -1 if the first integer is less than the second.

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Problem 3 (15 points):  

Write a function called print_better that takes an integer as parameter.
If that integer is bigger than 0, the function should print "Ann is better
than Bill".  If the integer is less than 0, the function should print
"Bill is better than Ann".

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Problem 4 (25 points):  

Write a program using all the above functions.  The program should 
read in Ann's grade and Ann's age, and Bill's grade and Bill's age.
Then it should print who has a better grade.  After that, for each
grade, it should add ten points if that person is 18 years old or
younger.  Then it should print who has a better grade after that.

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Problem 5 (30 points):  

Write a function called get_grades, using any of the above functions
that are necessary.  The function should read in people's grades and
ages until it gets a negative age.  After reading in each grade and
age it should add ten points to the grade if that person is 18 years
old or younger.  After reading in all the grades, the program should
return true if at least one person had a grade of 90 or above (after
changing it).  If nobody did, the function should return false.

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