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  1. #1
    truant420 is offline Member
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    Default find first empty cell?

    What i want to do is use a for-loop to find the first empty cell in a 2D array and put a value in it. However, my code applies the loop to all empty cells in the array. What am i doing wrong here?
    Java Code:
    for (int row = 0; row < GRIDSIZE; row++) {
                    for (int col = 0; col < GRIDSIZE; col++) {
                        if (isEmpty(row, col) == false) {
                            printIt(); 
                        } else {
                            setCell(row, col, 1);

    Any help would be appreciated.

  2. #2
    JosAH's Avatar
    JosAH is offline Moderator
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    Break out of the loop when you've found an empty cell (and set a value in it):

    Java Code:
    } else {
       setCell(row, col, 1);
       return; // or break;
    }
    cenosillicaphobia: the fear for an empty beer glass

  3. #3
    truant420 is offline Member
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    Default

    it still sets the value of more than one empty square. any other ideas?
    edit: i got it to work. thanks anyway
    Last edited by truant420; 03-15-2011 at 10:21 AM.

  4. #4
    JosAH's Avatar
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    Quote Originally Posted by truant420 View Post
    it still sets the value of more than one empty square. any other ideas?
    edit: i got it to work. thanks anyway
    I guess you simple used a break to get out of the (innermost) loop; you need to break out of two loops.

    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

  5. #5
    truant420 is offline Member
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    Default

    yeah, that was the case. thank you, Jos.

  6. #6
    KevinWorkman's Avatar
    KevinWorkman is offline Crazy Cat Lady
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