if condition on array

Question

if i have

int win[][] ={{1,2,3},{4,5,6},{7,8,9},{1,4,7},{2,5,8},{3,6,9},{1,5,9},{3,5,7}};

Can I put condition in this way?

if(((win[0][0]) && (win[0][1]) && (win[0][2]))||

            ((win[1][0]) && (win[1][1]) && (win[1][2]))||   

            ((win[2][0]) && (win[2][1]) && (win[2][2]))||

            ((win[3][0]) && (win[3][1]) && (win[3][2]))||

            ((win[4][0]) && (win[4][1]) && (win[4][2]))||

            ((win[5][0]) && (win[5][1]) && (win[5][2]))||

            ((win[6][0]) && (win[6][1]) && (win[6][2]))||

            ((win[7][0]) && (win[7][1]) && (win[7][2]))||

            ((win[8][0]) && (win[8][1]) && win[8][2])))

I don't see why not... though why you would do it that way? Have you considered looping over every group of 3? — James
– James, Commented Nov 11, 2011 at 13:52

Egor · Accepted Answer · 2011-11-11 13:54:41Z

2

Your array is 8x3, means last element will be win[7][2]. So calling win[8][0] will throw an ArrayIndexOutOfBounds exception. If you correct this error, your code will work. Hope this helps.

answered Nov 11, 2011 at 13:54

Egor

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Kevin Coppock · Accepted Answer · 2011-11-11 14:51:32Z

1

For a clearer version of this, why not try:

for(int i = 0; i < 8; i++) {
    if(win[i][0] && win[i][1] && win[i][2]) {
        doStuff();
        break;
    }
}

answered Nov 11, 2011 at 14:51

Kevin Coppock

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2 Comments

eu127 Over a year ago

it's ok your solution, but i don't understand exactly how it works...for exemple if i=4, what will be the condition that will be verified?

Kevin Coppock Over a year ago

You just answered your own question. When i=4, the is in the if statement will be replaced with 4s. Since your original condition was if ANY set of three are all true (because of your use of the || OR operator). Mine adds the break because, after one of the conditions are true (e.g. if win[2][0] && win[2][1] && win[2][2] evaluates to true), there is no reason to continue evaluating the remainder of the sets.

andrershov · Accepted Answer · 2011-11-11 13:52:55Z

-1

If your aim is completely confuse the reader - you can

answered Nov 11, 2011 at 13:52

andrershov

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2 Comments

andrershov Over a year ago

don't have enough reputation yet to make comments

andrershov Over a year ago

Could you please explain why do you down vote this answer. Do you think it is ok to write such conditions?

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