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Thread: Looping through a multidimensional array

  1. #1
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    Default Looping through a multidimensional array

    Well I made myself a nice MultiDimensional array:
     int[][] newboard = {{0,0,0,0,6,0,0,0,9},
                            {0,6,0,0,0,0,3,0,1},
                            {2,0,0,0,0,9,8,0,0},
                            {1,9,6,0,0,2,0,0,8},
                            {0,0,0,3,0,8,0,0,0},
                            {8,0,0,9,0,0,1,7,5},
                            {0,0,1,7,0,0,0,0,4},
                            {6,0,7,0,0,0,0,8,0},
                            {4,0,0,0,9,0,0,0,0}};
    And I need to somehow scan through that board going from left to right, starting at the right side in the next row , printing out the array location of o's in the multidimensional array. This isn't homework, here's what I tried to do, it only prints out the 0's in the first row.

    So for the first 0 on the top left in the newboard[][], I need it to return
    X = 0;
    Y = 0;

    Here's what I tried, I'm not quite sure how to get it to read more than the first row;
    public void emptycellsearch(){
    	int y = 0;
    	int x = 0;
    	for(x = 0;x<=8;x++){
    		for(y = 0;y<=8;y++){
    			if(x==0 && newboard[x][y]==0){
    				System.out.println("X value is ");
    				System.out.println(x);
    				System.out.println("Y value is ");
    				System.out.println(y);
    			}
    		}
    	}
    }
    Last edited by helloworld922; October 11th, 2009 at 06:34 PM.


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Looping through a multidimensional array

    if(x==0 && newboard[x][y]==0)
    It will only print out things if x equals zero (first row). Incidentally, I think you meant to do this:
    for (int row = 0; row <= 8; row++)
    {
         for(int col = 0; col <= 8; col++)
         {
              if (newboard[row][col] == 0)
              {
                   //.. print out stuff
              }
         }
    }

    Rows run left/right, so their indices denote how far up/down they are, and columns run up/down, so their indices denote how far left/right you are (kind of confusing, but that's life).

  3. The Following User Says Thank You to helloworld922 For This Useful Post:

    MysticDeath (October 11th, 2009)

  4. #3
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    Default Re: Looping through a multidimensional array

    Oh thanks, that's what I was getting wrong..
    Yes this was what I meant to do.
    Thank you!

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