Homework # 3 N-Puzzle Using OOP Solution

In this homework, you will rewrite our N-Puzzle program using classes. Your overall program will behave very similar to your previous homework but your program structure will be considerably different.




Your main class will be named NPuzzle. It will have the following public functions




Fuction Name
Explanation
print
Prints the current configuration on the screen by sending it to cout
printReport
Prints a report about how many moves have been done since reset and


if the solution is found
readFromFile
Reads the current configuration from the file given as function


parameter. The file format is defined as in HW2.
writeToFile
Writes the current configuration to the file given as function parameter
shuffle
Makes N random moves to shuffle the board. N is given as a function


parameter.
reset
Resets the current configuration to the solution.
setsize
Sets the board size to given values. The values are given as parameters


and they can be at most 9x9. After setting the size, the boards should


be reset.
moveRandom
Makes a valid random move
moveIntelligent
Makes an “intelligent” move
move
Makes a move according to the given char parameter. If the


parameters is ‘L’ then, the blank tiles moves left, …, etc, as defined in


HW1.
solvePuzzle
Makes an attempt to solve the puzzle using your own algorithm from


HW2.






Your NPuzzle class defines and uses a private inner class named Board, which represents the board configuration using a private C type 2D array. This class defines the following functions




Fuction Name
Explanation
print
Prints the board on the screen by sending it to cout
readFromFile
Reads the board from the file given as function parameter. The file


format is defined as in HW2.
writeToFile
Writes the board to the file given as function parameter
reset
Resets the board to the solution.



setSize
Sets the board size to given values. The values are given as parameters


and they can be at most 9x9. After setting the size, the boards should


be reset.
move
Makes a move according to the given char parameter. If the


parameters is ‘L’ then the blank tiles moves left, …, etc, as defined in


HW1.
isSolved
Returns true if the board is a solution



Your program will use object or objects of NPuzzle to perform what we did previously in HW1 and HW2. Your command line options and your user interface is the same. The following table is repeated here just for convenience.




Input
Action
V
Solves the problem from the current configuration


using the intelligent algorithm.
T
Prints a report about how many moves have been


done and if the solution is found
E
Asks a file name and saves the current board


configuration as a loadable shape file.
O
Asks a file name and loads the current board


configuration from the shape file.
L
moves the empty cell left if there is room
R
moves the empty cell right if there is room
U
moves the empty cell up if there is room
D
moves the empty cell down if there is room
I
makes an “intelligent” move for you.
S
Shuffle- takes the board to the final solution, and


makes size*size random moves to shuffle the board.






Notes:

Do not use any functions from the standard C library (like printf), use cout, cin, etc.



Your program should have no global functions other than main. Do not use any global variables.



Do not use any C++ features that we did not learn during the lectures.



You will use all the object oriented techniques that we learned in the class including const, inline, declrtype, auto keywords.



Do not forget to indent your code and provide comments.
Check the validity of the user input.



Test your programs very carefully at least with 10 different runs and submit your result files for each.



You should submit your work to the moodle page and follow all the submission rules that will be posted.