Thread: 2d arrays

Think of 2d arrays as simply an array of arrays (because that's what they are). What has you confused? I'd write some example programs and play around with the concept- the best way to learn how to program is by writing code.

Originally Posted by jonathanfox

The whole coordinate shit and how you populate certain areas on you 2d array with integers or characters, like say im doing a sudoku puzle, how the hell do i populate the grid with random numbers in 3x3 sections, stuff like that

Like I said, the best way to learn is by coding. Have you actually attempted to write a program that does this?

I'm not really sure what exactly you mean by coordinates. Like I said, a 2d array is just an array of arrays. So if you have array[x][y], the x index is simply accessing the top-level array (which returns another array). Then the y index is accessing that inner array, and returns whatever type you put into it.

How you display a 2d array is a different question. So to talk about coordinates, you first have to explain how you're displaying the arrays.

If you're still confused, write a program that populates a 2d array with all zeros and then changes a specific "coordinate" to a one. Where is that one? What if you move it around in the array?