UMBC CS 201, Fall 98
Project 3: Morse Code
Due date: Wednesday, November 11, 1998
Important: Revision of a required function's prototype
made on 11/2. See below.
Morse code, patented by Samuel F. B. Morse in 1837, is the language that
was used to send messages by telegraph from the middle of the nineteenth
century until the advent of the modern telephone and today's
computer-controlled communications systems. In Morse code, each letter
in the alphabet is represented by a series of dots and dashes as shown
in the table below:
A .- H .... O --- V ...-
B -... I .. P .--. W .--
C -.-. J .--- Q --.- X -..-
D -.. K -.- R .-. Y -.--
E . L .-.. S ... Z --..
F ..-. M -- T -
G --. N -. U ..-
This project will give you some experience with file-handling, malloc, strings,
characters, and pointers. Of course, it will also test function writing,
separate compilation and design.
Description of the Program
This project is to read the contents of a file into a string, give a report
of the kinds of characters in that string and then print out its Morse code
equivalent. There is a text file, called morse.txt, that I have made
available to you for this project. There is a link to it further down in the
To be more specific, your project is to ask the user for the name of the file,
read in the contents of the file, and translate it from English into Morse
code. Your program should also report the number of spaces, punctuation marks,
and the number of other non-alphabetic characters that exist in the file.
You will need to open the file and progress through it counting the characters
as you go. Don't try to store the characters on the first pass through the
file, just count the characters. After the length of the file has been
determined, you should use malloc to allocate space that is exactly the
correct size to hold the contents of the file in a string. You can get back
to the beginning of the file by using rewind and then read a character at a
time into the string.
Your project must contain the two functions that I have described below.
Design will begin to count towards your grade with this project, so I would
imagine that you may have other functions as well. Separate compilation is
required. The required functions are called ReadFile() and CountNonAlpha().
These functions are described below and the prototypes are given.
char* ReadFile (int *lengthPtr);
The prototype for CountNonAlpha has changed
void CountNonAlpha (char *str, int length, int *spacePtr, int *punctPtr,
- In the function ReadFile(), you are to read the entire contents of
a file, morse.txt into a string. You must malloc the space
to hold this string and return the address of the string to the
calling function. You should have a variable in main called
length and ReadFile must modify that variable so that it will
contain the number of characters read (the length of the string).
- The function CountNonAlpha() is to make use of functions or macros
available in the ctype library to count the number of white space
characters, punctuation marks, and other non-alphabetic characters
found in the string.
When printing the Morse code translation of the sentence, separate the code
for each letter with a space. Each word should be shown on a separate line.
All other non-alphabetic characters that occur in the string should be ignored
when translating it into Morse code.
Enter the name of the text file to be examined: morse.txt
The string is :
The quick brown fox jumps over the lazy dog.
It consists of 45 characters.
There are 9 space(s), 1 punctuation mark(s), and
0 other non-alphabetic characters.
In Morse code this is :
- .... .
--.- ..- .. -.-. -.-
-... .-. --- .-- -.
..-. --- -..-
.--- ..- -- .--. ...
--- ...- . .-.
- .... .
.-.. .- --.. -.--
-.. --- --.
- You will be graded on your design and on the efficiency of the program,
as well as the correctness of the program, documentation and style.
Obtaining the file
The file to use for this project is called
morse.txt. The executable and the data file need to be in the same
directory in order for the program to run properly.
What to Turn In
You must use separate compilation for this project.
You may have as many .c and .h files, as you see fit.
Use the submit command to submit your files.