//Bonus

public class Sudoku{

/*

Todo: Generate a Sudoku with random values.

The number of given values in the grid should

be chosen according to the difficulty level.

There are 3 difficulty levels:

Easy, Medium and High.

Let the user decide on the difficulty of the game.

The user chooses coordinates in the grid and enters a value.

After each input, check if the entered value is valid.

Congratulate the user when he or she solved the Sudoku.

*/

public static void main(String[] args) {

System.out.println(" 0 1 2 3 4 5 6 7 8");

System.out.println(" -------------------------------");

for(int x = 0; x<9; x++){

System.out.print(x + " |");

for(int y = 0; y<9; y++){

System.out.print(" - ");

if(y%3==2){

System.out.print("|");

}

}

System.out.println();

if(x%3==2){

System.out.println(" -------------------------------");

}

}

}

}