problem with array and led strip neopixel

Using Arduino Programming Questions
#1

hello!
i’m getting start with arduino and C language.
my little project:
control 8 led 1meter strip adafruit neopixel with my arduino uno.

first, we have to declare a name for each strip we are usig as folowing

Adafruit_NeoPixel name = Adafruit_NeoPixel(60, PIN, NEO_GRB)

as I have 8 led strip, i’d like to put all those name in an array.
so i did:

char strip[] = "abcdefgh"

with “a” the name of the first strip
“b” the name of the second etc…

first question, is it possible to use a for loop before the void setup?
anyway, the i put:

Adafruit_NeoPixel a = Adafruit_NeoPixel(60, PinColone[1], NEO_GRB);
Adafruit_NeoPixel b = Adafruit_NeoPixel(60, PinColone[2], NEO_GRB);
Adafruit_NeoPixel c = Adafruit_NeoPixel(60, PinColone[3], NEO_GRB);
Adafruit_NeoPixel d = Adafruit_NeoPixel(60, PinColone[4], NEO_GRB);
Adafruit_NeoPixel e = Adafruit_NeoPixel(60, PinColone[5], NEO_GRB);
Adafruit_NeoPixel f = Adafruit_NeoPixel(60, PinColone[6], NEO_GRB);
Adafruit_NeoPixel g = Adafruit_NeoPixel(60, PinColone[7], NEO_GRB);
Adafruit_NeoPixel h = Adafruit_NeoPixel(60, PinColone[8], NEO_GRB);

problem is in my void setup, I have to start communication with my strip by

name.begin();

or when i do:

for (int i = 0; i <= 7; i++) {
    strip[i].begin();
  }

it returns me :error: request for member ‘begin’ in ‘strip*’, which is of non-class type ‘char’*
i really don’t understand how i can solve this…
sorry for my bad english, i’m french

#2

runH2O:
as I have 8 led strip, i’d like to put all those name in an array.

You are planning a very strange array with very strange named indexing.

Normally it should look like that:

#include <Adafruit_NeoPixel.h>

Adafruit_NeoPixel pixelStrings[] = {
  Adafruit_NeoPixel(32, 2, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 3, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 4, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 5, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 6, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 7, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 8, NEO_GRB + NEO_KHZ800),
  Adafruit_NeoPixel(32, 9, NEO_GRB + NEO_KHZ800),
};

#define NUMSTRIPS (sizeof(pixelStrings)/sizeof(pixelStrings[0]))

void setup() {
  for(int i=0; i<NUMSTRIPS; i++)
  {
    pixelStrings[i].begin();
    pixelStrings[i].show(); // Initialize all pixels to 'off'
  }
}

void loop() {
}

And each element of the pixelStrings array is accessed by its index number.

#3

thank you very much for this answer,
i'm going to try this,

#4

no more error in my code,
Thanks again!

#5