Description

In this problem, a user can input some “words”, set their formats, and change their contents.

The program architecture is explained as follows.

 

A. Definition of class Formatter

• Consider a Formatter as a capability to format a string.
• Different Formatters will use different ways to format a string.
• Derived classes
  • Uppercase
    • After formatted, the resultant string will be uppercase.
  • Lowercase
    • After formatted, the resultant string will be lowercase.
  • Marked
    • After formatted, the resultant string will be [given string].

 

B. Definition of class Word

• A Word contains a string and a Formatter.

 

C. Definition of class Handler

• Consider a Handler as a capability to operate two Words.
• Different Handlers will use different ways to operate two Words.
• Derived classes
  • Swap Handler
    • After operation, two Words will exchange their strings and Formatters.
  • Attach Handler
    • After operation, the second Word’s string will be appended to the first Word’s string.

 

​​​D. Definition of class Word Manipulator

• A Word Manipulator maintains a doubly linked list of several Words.
• A Word Manipulator has a Swap Handler and an Attach Handler. We can switch the mode of a Word Manipulator to change the current Handler.

 

Note:

1. This problem involves three files.

• function.h: Class definitions.
• function.cpp: Member-function definitions.
• main.cpp: A driver program to test your class implementation.

    You will be provided with main.cpp and function.h, and asked to implement function.cpp.

2. You need to implement

• Uppercase:

• string format(const string &str)

• Lowercase:

• string format(const string &str)

• Marked:

• string format(const string &str)

• Word:

• const Word &operator=( const Word &w)

• SwapHandler:

• void handle(Word &w1,Word &w2)

• AttachHandler:

• void handle(Word &w1,Word &w2)

• WordManipulator:

• void switchMode()
• void readWords()

 

3. For OJ submission:

     Step 1. Submit only your function.cpp into the submission block.

     Step 2. Check the results and debug your program if necessary.

 

 

Input

First part:

• Each line has a command and a string. You have to read the string to a Word and set a corresponding Formatter to it according to the command.
• A command e means the end of the first part.
• Commands
  • u

Use Uppercase

• l

Use Lowercase

• m

Use Marked

 

Second part:

There are two kinds of commands

• s
  • Switch the mode of Word Manipulator.
• o n m
  • Let Word Manipulator operate (n, m) where n and m are the indices of two Words.

 

 

Output

Show the result of Word Manipulator.

 

 

Sample Input  Download

Sample Output  Download

Partial Judge Code

11439.cpp

Partial Judge Header

11439.h

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