Thread: Apmatrix error.

Hello, long time lurker first time poster.

Anyway, I've been using apmatrix for a short time and I've run across a problem.

Anytime I choose to use

board[row-1][col] = blahblah

It works just fine. But when I add

board[row+1][col] = blahblah

I can compile it fine, but when I run the function to make it go row+1 it will just quit out, giving me an illegal matrix bounds(?) error. I'm pretty sure that means it does not go down one space, but it goes down until it is out of the matrix board, so that causes an error?

...Any ideas on how to fix this?

btw I can show more code if you guys want.

It sounds like you're trying to access part of the array that doesn't exist. If you declare:

Code:

 int array[4];

and later on try to access or assign a value to

Code:

 array[anything over 3]

you're going to have a problem because the only indexes for array that are valid are 0,1,2,3.

If array has x indeces, and at the time the program hits this line:

Code:

board[row+1][col] = blahblah

then if row >= x - 1, you're going to have trouble. Take a look at what the boundaries of your array are, and where row is when you hit that line in the code.

> is there any other good 2d (X/Y axis) type of thing, I can use for C++?
Like a vector for example

vector < vector < int > > myMatrix;

I've no idea what an apmatrix is, but I guess it doesn't expand like a vector can do.