Puzzle Updating: Uniform Treatment

• Rule of Thumb. Avoid case analysis if possible.

/* Update puz according to each move. */

int m; // current move

m = in.readInt();

while ( m != endMove ) {

// Process move m.

// Blank moves to rowNew, colNew.

int rowNew = _________________________;

int colNew = _________________________;

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

puz[rowNew][colNew] = Blank;

rowB = rowNew;

colB = colNew;

m = in.readInt();

}

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