- Save a copy of the file lab01.cpp.html which is available here. Save it as a file in your home
directory. Give the file this name: lab01.cpp. Be sure
to give it exactly that name -- it's important. (In "lab01" the
characters "01" are the digits for zero and one.) To make a copy of the
file you just display it in the web browser, copy it to the clipboard,
paste it into an editor window, and then save the window.
- Compile, link, and execute lab01.cpp. For help
with this step you may refer to the example commands and
discussion under "Compiling and Linking" and "Checking for
Errors and Executing the Program" in the
"Hello World!"
assignment.
- The comment:
// Program to print part of a song
at the beginning of your program is called a program
header comment. Add your name(s) and the date to that
header comment and re-format it like this header comment is
formatted:
/*
Program to print part of a song
Programmers: Billy Barrow & Polly Parker
Date: May 22, 1934
*/
Please Note: I'm asking that you duplicate the form above, but use your
real name(s) and the actual date.
Next, re-run the program -- in other words:
- Save the file.
- Compile and link the program again.
- Execute the program again.
Did the output change? In other words, was the output different this
time from the first time you ran the program? Why or why not? Open a new
editor file for your notes and put the questions above and the answers in
your notes. (You will have to turn in a copy of your notes as part of
this assignment.)
- Change the first line of the header comment so it says the
following:
Program to print part of the song "Pretty Boy Floyd"
Re-run the program (as defined above). Did the output
change? Why or why not? Put the questions and answer in
your notes.
- In the second output statement, change "A tale I will relate" to "A story
I will tell". In the last output statement, change "known throughout
this state." to "Oklahoma knew him well." Re-run the program. Did the
output change? How? Put the questions and answers in your notes.
- Add another output statement at the begining of main that
displays the title:
Pretty Boy Floyd
Make sure to indent the output statement properly - like the lines
of code that are already in the program.
Write the output statement so that a few blank spaces will be printed
before the title, and a blank line before the words of the song. Re-run
the program to make sure your changes do what they are supposed to
do.
- Add other output statements so that when you run the program
the display will be:
Pretty Boy Floyd
If you'll gather 'round me, children,
A story I will tell
'Bout Pretty Boy Floyd, an outlaw,
Oklahoma knew him well.
As you are formatting your program statements, continue to preserve the
proper indentation pattern. Also, keep in mind this piece of advice
from our text: "You should not break a quoted string across two lines ...
."
For example, you should not write a statement this way:
cout << "There a deputy
sheriff approached him\n" ;
Because it would break the quoted string "There a deputy sheriff approached
him\n" across two lines in the C++ program.
- Add more output statements to display another three verses separated by
blank lines:
It was in the town of Shawnee,
It was Saturday afternoon,
His wife beside him in his wagon
As into town they rode.
There a deputy sheriff approached him
In a manner rather rude,
Using vulgar words of language,
And his wife she overheard.
Pretty Boy grabbed a log chain,
And the deputy grabbed his gun;
And in the fight that followed
He laid that deputy down.
- Re-run the program. The output should look like this:
Pretty Boy Floyd
If you'll gather 'round me, children,
A story I will tell
'Bout Pretty Boy Floyd, an outlaw,
Oklahoma knew him well.
It was in the town of Shawnee,
It was Saturday afternoon,
His wife beside him in his wagon
As into town they rode.
There a deputy sheriff approached him
In a manner rather rude,
Using vulgar words of language,
And his wife she overheard.
Pretty Boy grabbed a log chain,
And the deputy grabbed his gun;
And in the fight that followed
He laid that deputy down.
The output must include a blank line before the title, and a
blank line after the last line of text. If necessary debug the program
until it is working properly. Print the code of the program (this is
called a listing) with the command:
lp lab01.cpp
Above,
- lp is the print command -- lp stands for "line printer."
- The lab01.cpp is the name of the file you are printing.
Next make a script of a run of the program. Make the script in the
manner you did in the step entitled "Making a Record of a Program Run" in
the
"Hello World!"
assignment.
Remember to perform the steps to filter the "weird" characters out of the
script. The procedure for filtering a script is described in the directions for the
"Hello World!"
assignment.
Print the script with an "lp" command similar to the one illustrated
above. (It's an exercise for you to figure out the exact form the
command should have.)
Also print a copy of your lab notes with an "lp" command. (Figure out the
exact form the command should have.)
Retrieve your printouts from the printer. To avoid damaging the
printer, be especially careful to read and follow the
directions on the printer!
Write the names of both (all) lab team members on each
printout. Bring the printouts to me on the due date. Check
the class schedule
for the due date.