How to return result of function?

I am making a java sudoku solver, and I cant seem to get one function working.?

• I am currently in the last stages of it. We had to have functions to check if each row, column and smaller box were valid, and those functions work fine alone, and within the isValid() function. But once I put it into another function, isValid() always fails. can anyone fix this code for me? /** * Checks the row. Returns true if the row contains non-duplicate numbers 1-9. * 0's indicate the square has no value yet and are considered valid. * * @param row * @return */ public boolean rowCheck(int row) { // TODO: your code goes here! for(int c=0; c<9; c++ ) { for(int k=0; k<9; k++ ) { if(k!=c){ if( puzzle[row][c] == puzzle[row][k]) return false; }} } return true; } /** * Checks the column. Returns true if the row contains non-duplicate numbers 1-9. * 0's indicate the square has no value yet and are considered valid. * * @param column * @return */ public boolean columnCheck(int column) { // TODO: your code goes here! for( int j=0; j< 9; j++ ) { for( int h=0; h< 9; h++ ) { if(j!=h){ if( puzzle[j][column] == puzzle[h][column] ) return false; }} } return true; } /** * Checks the box. The box layout should be considered as smaller 3x3 grids with * the box parameter corresponding to: * 012 * 345 * 678 * * Returns true if the row contains non-duplicate numbers 1-9. * 0's indicate the square has no value yet and are considered valid. * * @param box * @return */ public boolean boxCheck(int box) { // TODO: your code goes here! int rowStart = (box / 3)*3; int columnStart = (box % 3)*3; for( int j= 0; j<=2; j++ ) { for( int h=0; h<=2; h++ ) { for( int f= 0; f<=2; f++ ) { for( int k=0; k<=2; k++ ) { if((j== f && h!= k) || (j!= f && h== k) || (j!= f && h!=k)){ if(puzzle[rowStart + j][columnStart + h] == puzzle[rowStart + f][columnStart +k]) return false; }}}} } return true; } /** * Returns true if all of the box, row, and column checks are valid. * * @return */ public boolean isValid() { for (int i = 0; i < 9; i++) { if (!boxCheck(i) || !rowCheck(i) || !columnCheck(i)) { return false; } } return true; } /** * Applies a move to the board by mutating the puzzle. * * @param move */ public void applyMove(SudokuMove move) { puzzle[move.getRow()][move.getColumn()] = move.getValue(); movesTested++; } /** * Undoes a move on the board by mutating the puzzle. * * @param move */ public void undoMove(SudokuMove move) { puzzle[move.getRow()][move.getColumn()] = 0; } /** * Gets all valid moves for the given row and column. Returning a list * of all values 1-9 will cause the search to take way too long. This list * needs to be limited to only values that do not immediately invalidate * one of the game rules. * * Hint: you can use the applyMove/undoMove methods. * * @param row * @param column * @return */ public LinkedList<SudokuMove> getAllValidMoves(int row, int column) { LinkedList<SudokuMove> result = new LinkedList<SudokuMove>(); // TODO: your code goes here! for (int i = 1; i <= 9; i++) { SudokuMove move = new SudokuMove (row, column, i); applyMove(move); //System.out.println(rowCheck(row)); //System.out.println(columnCheck(column… System.out.println(isValid()); if (isValid()){ result.addLast(move); } undoMove(move); } ; return result; } any and all help would be very appreciated.

• Answer:

  Earlier today I gave you the code for checking that a row is valid. I was very displeased to find that you promptly deleted your question. Let me strongly encourage you to leave your questions that have been answered up so that others can benefit.