Puzzle Updating: Final Version

/* Update puz according to each move. */

/* Offsets to new position of blank on move m are delatR[m] and deltaC[m]. */

int [] deltaR = {0, -1, 1, 0, 0};

int [] deltaC = {0, 0, 0, -1, 1};

/* rowB,colB is position of blank, initially the lower-right hand corner.

int rowB = 3;

int colB = 3;

int m; // current move

m = in.readInt();

while ( m != endMove ) {

// Process move m.

// Blank moves to rowNew, colNew.

int rowNew = rowB + deltaR[m];

int colNew = colB + deltaC[m];

puz[rowB][colB] = puz[rowNew][colNew];

rowB = rowNew;

colB = colNew;

m = in.readInt();

}

puz[rowB][colB] = Blank;

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