Midterm Examination
                                      CS 141
                               Wednesday, October 15, 1997



This is a closed-book, closed-notes examination.  There are five
problems.  Do not spend too much time on any problem. Read them 
all through first and solve them in the order that allows you to 
make the most progress.  

For each of the problems, you need to write a program or
a function.  You do not need to write comments, function
prototypes, or include statements.  Your program doesn't
have to be fancy or user-friendly.  You should make it as simple as
possible, as long as it does what is required.  


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Problem 1 (20 points):  

A.  Write a function called birthday that takes an integer n as parameter, 
then prints "Happy Birthday" n times, each time on a different line.

B.  Using the function of part A, write a program that prints 
"Happy Birthday" 10 times.
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Problem 2 (20 points):  

A.  Write a function with one input parameter.  This function should read
in two numbers from the keyboard and put their sum into the variable that 
is the input parameter to the function.

B.  Using the function from part A, write a program to read in two numbers 
and print their sum.
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Problem 3 (20 points):  

A.  Write a function that has an integer as parameter.  The function 
should return 'p' if that integer is positive, 'n' if the integer is 
negative, and 'z' if the integer is zero

B.  Using the function of part A, write a program that reads in an 
integer from the keyboard.  Then prints a 'p' if that number is positive, 
'n' if it is negative, and 'z' if it is zero.
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Problem 4 (20 points):  

A.  Write a function called even_minus_odd that reads in integers 
from the keyboard until -1 is read in.  Then it returns the sum of 
the even numbers it read in minus the sum of the odd numbers 
(except for -1) that it read in.

B.  Using the function from part A, write a program that reads in 
integers from the keyboard until -1 is read in.  Then it prints the 
sum of the even numbers it read in minus the sum of the odd numbers 
(except for -1) that it read in.
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Problem 5 (20 points):  

A.  Write a function called in_between that takes three integers as 
parameters.  The function should return a 1 if the third number is bigger 
than the first and smaller than the second number. The function should 
return 0 if that is not true.  However, if the first number is larger 
than or equal to the second, you should return -1, instead of 1 or 0.

B.  Using the function of part A, write a program that reads in two 
numbers, then prints whether or not 100 is bigger than the first number 
read in and smaller than the second.  If the first number is larger than 
or equal to the second, it should print out an error message instead.
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