Create grid with starting value in center

[M Bryan]

Hi,

I want to create a grid with (partially) random values. Lets say the grid looks like this:

X X X X
X 9 X X
X X X X
X X X X

The other values should evolve from the values around them, whereas one value is fixed, like this:

9 8 7 6
8 9 8 7
7 8 7 6
7 7 7 7

The change in value from one field to another should not be bigger than one, but should be randomly. E.g., in the bottom right field there is a 7. The field above has a 6, so it could be 5, 6 or 7. The field to the left has a 7, so the value could be 6, 7 or 8. Since 6 and 7 appear in both list, the value has to be either 6 or 7.

Has anybody a good idea, how i could program this logic?

Thank you!

[fred rosenberger]

The first steps are always the same.

forget about computers, programming, data structures, etc.

Pretend you have a piece of paper with the above initial grid on it.

How would you tell a child how to do what you want? What steps should they follow?

You LITERALLY need to write this down. Writing it forces you to think through the problem.