Rotating sections of a 2D array

Programming Questions

David Wil..

Rotating sections of a 2D array

in Programming Questions • 2 years ago

Hi all.

I have the following 2D array:

1 2 4 6 2 3 6
1 2 5 2 5 6 3
2 5 6 3 7 2 4
3 5 7 2 3 7 3
1 6 3 7 4 5 2
2 6 3 7 4 3 2

Say I represent this as a grid of buttons, when I press [0][0] - I want the following to happen:

[0][0] = [1][0]
[1][0] = [1][1]
[1][1] = [0][1]
[0][1] = [0][0]

My question is, how do I go about writing a function to do this that works across the whole array, just rotating groups of 4? Any pointers would be much appreciated!

Thanks

Dave

Processing user on Google Plus? http://gplus.to/calx

Replies(2)

allonestr..

Re: Rotating sections of a 2D array

2 years ago

[untested] How about

Copy code

void rotateFour(arrayName[a][b])
{
arrayName[a][b] = tempValue;
arrayName[a][b] = arrayName[a+1][b];
arrayName[a+1][b] = arrayName[a+1][b+1];
arrayName[a+1][b+1] = arrayName[a][b+1];
arrayName[a][b] = tempValue;
}

David Wil..

Re: Rotating sections of a 2D array

2 years ago

Thanks, that got the ball rolling for sure - I ended up with:

void rotateFour(int a, int b)

{

int tempValue;

tempValue = balls[a][b];

balls[a][b] = balls[a+1][b];

balls[a+1][b] = balls[a+1][b+1];

balls[a+1][b+1] = balls[a][b+1];

balls[a][b+1] = tempValue;

}

EDIT: Pardon the terrible pun.

Processing user on Google Plus? http://gplus.to/calx

Top Reply

Statistics

2 Replies
465 Views
0 Followers

Actions

Permalink