Don't understand code line?!

[SoundMTB]

Hi

can someone explain me the following Code line please:

Code: Select all

 vbatRawArray[(ind++)%8] = analogRead(V_BATPIN);

I realy not understand the (ind++)%8 espacialy the %8

regards
Oliver

[timecop]

Ind is incremented, its value is limited to 0..7 (mod 8) to be used as array index.
You might want to give this a read
http://en.m.wikipedia.org/wiki/The_C_Pr ... g_Language

[frank26080115]

%8 is there to ensure you never index out of the bounds of the array, which has only room for 8 elements, it's a common technique when you don't really care where in the array you are storing

[SoundMTB]

Many thank's

Now is clear

Oliver

[KaiK]

Its called Modulo Operator: http://en.wikibooks.org/wiki/Reaktor/Mo ... ulo,_x%25y