selecting arrays

Projects Programming
1

Hi,
I may have a simple question but I cannot find it it the forum yet:
I have a bunch of arrays like

int map1[] = { 210, 200, 190, 180, 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 0 };
int map2[] = { 210, 200, 190, 180, 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 0 };

What is basically want to do is using an algo like

selected= 120/60

This will give me value 2

I am searching for a possibility to retrieve array values like this

value = (map(selected))[4]

Does anyone have an idea how to do that?

2

Yes, Multi-dimension arrays.

int map[ 2 ][ 22 ] = {
210, 200, 190, 180, 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 0,
210, 200, 190, 180, 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 0 };

You can go many dimensions, boxes of boxes in yet more boxes kind of thing. Just keep in mind that you have very limited RAM but more space in flash where the program is kept; you can keep pre-set constants, numbers and text, in flash with the program.

UNO has 32k flash, 2k RAM, 1k EEPROM.