CSCE 240 (sections 2 and 3) – Programming Assignment Three

CSCE 240 (sections 2 and 3) – Programming Assignment Three

Program Purpose
Read a text file and output:
- The alphabetic character(s) that appear most frequently in the file (note: for all
counts, ignore the character’s case. e.g. treat ‘a’ and ‘A’ as the same character)
- The alphabetic character(s) that appear least frequently in the file
- A list of the characters and their frequencies, sorted from most frequent to least
frequent. Characters that appear with the same frequency should be sorted
alphabetically
- A bar chart displaying the frequencies of each character with the bars displaying
with asterisk. The horizontal axis should be the characters from a-z with a space
between each character
Example Input / Output
Input file contents:
The quick brown fox jumps over the lazy dog.
Program’s corresponding output:
Highest frequency character (appeared 4 times in the file): o
Lowest frequency characters (appeared 1 time in the file): a, b, c, d, f, g, i, j,
k, l, m, n, p, q, s, v, w, x, y, and z
o: 4
e: 3
h: 2
r: 2
t: 2
u: 2
a: 1
b: 1
c: 1
d: 1
f: 1
g: 1
i: 1
j: 1
k: 1
l: 1
m: 1
n: 1
p: 1
q: 1
s: 1
v: 1
w: 1
x: 1
y: 1
z: 1
4 *
3 * *
2 * * * * * *
1 * * * * * * * * * * * * * * * * * * * * * * * * * *
 a b c d e f g h i j k l m n o p q r s t u v w x y z
Specifications
- All output should be directed to the standard output device using cout.
- Output formatting should match the example above and the sample output files given
for the tests provided. Note the proper use of singular and plural (character/
characters, time/times) and use of commas and “and” when listing characters.
- Your main function’s signature should be: main(int argc, char * argv[])
- Your program will be run with the program name followed by the name of the input
file your file should open and read (argv[1]). For example, if one types
./program3 test1-input.txt
at the command prompt, program3 should open test1-input.txt from the current
directory, read all of the text in the file, and produce output to the standard
output device (using cout)
- Your main function must be implemented in program3.cc
- Place the function prototypes for all functions you write to call in your main in
program3functions.h
- Place the function implementations for all functions you write to call in your main
in program3functions.cc
- The only header files that may be included in your code are: iostream, fstream,
iomanip, cmath, cctype, and program3functions.h
- You will submit a zip file (only a zip file will be accepted) containing
program3.cc, program3functions.h, and program3functions.cc
- Programs must compile and run on a computer of the instructor’s choosing in the
Linux lab (see your course syllabus for additional details).
- Be sure to review the program expectations section of the course syllabus.
Testing
Text files containing sample input and the corresponding expected output for program3
are also attached to the assignment. A makefile has been included to run your program
with the sample input and compare the results to the expected output. In order to use
the makefile, ensure that your program3functions.h, program3functions.cc, and
program3.cc files and all of the files attached to the assignment (checkit.cc,
correct-test1.txt, correct-test2.txt, makefile, test1-input.txt, test2-input.txt) are
in the same directory. Your program will be graded using this same method with
different input/output file pairs.
To run the included tests on your program, type:
make program3test1
make program3test2
Note: Differences in capitalization or spacing (including extra whitespace at the end
of the output) and prompts for input will cause the provided tests to fail. End
your last output statement with endl. The tests will display your output up to
the first character that doesn’t match the expected output. You can view your
full output in the student-test#.txt file and compare it to the corresponding
expected output in the correct-test#.txt file.
Grade Breakdown
Style: 1 point
Documentation: 1 point
Clean compile and link of program3.cc: 1 point
Correctly displays highest frequency characters for instructor tests: 1 point
Correctly displays lowest frequency characters for instructor tests: 1 point
Correctly displays character frequencies for instructor tests: 3 points
Correctly displays bar chart for instructor tests: 2 point
The penalty for late assignment submissions is 10% per day up to three days after the
assignment due date. No assignment submissions will be accepted more that 3 days
after the due date.