CSCI 116 Fall 2004 Exam #1
1 October 2004
Instructions: Write your answers in the space provided. If you need more room, use the back of one of
the other sheets of the test, and indicate where I can find your work. For partial credit, be sure to show your
work! This test is closed book, closed
notes, closed neighbor, open mind. Any
calculations are simple enough that you don’t need to use a calculator. Read through the entire test before starting
to answer any of the questions so that you can answer the easiest questions
first and maximize your score. Not
counting the bonus question, there are 100 points on this test. You have 50 minutes to complete the test. Good luck, and have fun!
1. (30 points) What are the values of the following
expressions?
a. 3 + 2
b. 5 - 8 - 3
c. 14.5 / 5
d. 3+4
* 7-5
e. 1 == 0
f.
(3
== 4) || (7 > 5)
g. 3 / 4 * 8
h. ! ( (3 != 4) && (6 <= 8)
)
i.
(2
* (3 + (11 – 5) / 2))
j.
11
% 4
2. (30 points) Write C++ code to do the requested
operations. You do not need to write
anything except for what is specified!
a. Declare integer variables named foo and bar.
b. Specify the prototype for a function
named red
that takes an integer and a character as parameters (in that order, passed by
value), and returns a double precision floating point number.
c. Write an if statement that tests the value of
the variable reader. If the value is
positive, set the variable writer to -1; if the value is negative, set the value of writer to 1; if the value is 0, set the
value of writer
to 0.
d. Write a while loop that adds up 20 even numbers,
starting with 2 and stores the result in the variable sum.
e. Write code to ask the user to input
an integer and then to read and store the number in the variable input.
f.
Write
code to add the remainder of count after division by 7 to the value stored in number, and to store the result in answer.
3. (10 points) Answer the following questions in the space
provided:
a. Describe one difference between a do
while loop and a while loop, and explain when you would choose to use each.
b. What is the difference between pass
by value and pass by reference? Describe
an instance where it matters which we use.
4. (15 points) Write a C++ function that takes two integers
as parameters, and returns the sum of the two as a double.
5. (15 points) Write a complete program that prints out the
message, “You said we wouldn’t have to write a complete program!” on a separate
line, and then exits.
Bonus: On a train, Smithe, Robins, and John are the fireman, conductor, and the
engineer, but NOT respectively. Also aboard the train are three businessmen who
have the same names: a Mr. Smithe, a Mr. Robins, and a Mr. John.
Mr. Robins
Lives in
Who is the
Engineer?