# CSE 241/505 Homework # 3 N-Puzzle Using OOP solved

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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
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 9×9. 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 9×9. 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.
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.
 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.