FOR C#

Character Counter Linked List

Design a program that reads in an ASCII text file (provided) and creates an output file that contains each unique character and the number of time the character appears in the file. Do not sort the output. Each unique character in the file must be represented by a character frequency class instance. For this exercise, the character frequency objects must be stored in a Linked List. Read the input file character-by-character. Reading the entire file into memory is prohibited.

For example, given the sample input file:

Hello.

The output file would look like this:

H(72) = 1

e(101) = 1

l(108) = 2

o(111) = 1

.(46) = 1

Where the format of the file is the character followed by the characters ASCII value followed by the number of times the character occurred in the file.

The program should be able to be executed from the command line using the following syntax:

programname.exe

For example, counter.exe myInput.txt Count.txt

Where counter.exe is the program name, myInput.txt is the input ASCII file, and the Count.txt is the output file.

The character frequency class must implement the properties and methods given in the UML diagram below. Note that the actual names of the methods can vary slightly based upon the language used. For example, the method getCharacter() would be appropriate for Java and C++; however, the property get method called, Character would be appropriate for C#/VB.

CharacterFrequency -ch: char -frequency: int +getCharacter): char +setCharacter(character: char) getFrequency(): int +setFrequency(frequency: int) +increment() +Equals(): bool +ToString() string