Using digitalRead in For loop

Using Arduino Programming Questions
1

Hello all! I've got a question that's probably pretty stupid (especially since I've been doing basic Arduino stuff for a while) but I've never messed with things like arrays and For loops.

Basic summary of goals: I am going to have 8 pins pulled high with the internal pullups and always pulled low externally. I want to read when they go high, then send the value of which pin is high over an NRF24L01 to another Arduino.
Only one pin will ever go high at a time.

Problem: in the Void Loop, inside the If statement, I get the compiler error that "Box" was not declared in this scope.

What am I doing wrong here guys?

const int Box0 = 2;   //Lid
const int Box1 = 3;   //
const int Box2 = 4;   //
const int Box3 = 5;   //
const int Box4 = 6;   //
const int Box5 = 9;   //
const int Box6 = 10;  //
const int Box7 = A0;  //Bottom

int Signal;

/*
  Pin 7  - CE  
  Pin 8  - CSN 
  Pin 11 - MOSI
  Pin 12 - MISO
  Pin 13 - SCK
*/

void setup(){
  for(int i=0; i<=7; i++){
    pinMode(Box[i], INPUT_PULLUP);
  }
}

void loop(){
  for(int i=0; i<=7; i++){
    if(digitalRead(Box[i]) == HIGH){
      Signal = i+1
    }
    else() Signal = 0;
  }
}
2

Where do YOU see an array named "Box"? I see a bunch of int variables named Box0 through Box7, but no array anywhere...

Regards,
Ray L.

3

RayLivingston:
Where do YOU see an array named "Box"? I see a bunch of int variables named Box0 through Box7, but no array anywhere...

Regards,
Ray L.

I think that's my problem, I haven't used an array because the pin numbers don't go directly in order. Can I name them Box0-Box7 but assign them to the random pins I have available?

4

I haven't used an array because the pin numbers don't go directly in order.

That's the best reason to use an array

5

AWOL:
That's the best reason to use an array

So would I do something like this?

int Box[] = {2, 3, 4, 5, 6, 9, 10, A0};

6

const byte would be better, but largely, yes.

7

Oh, duh. I was using const int in the first place.

So do I need to put an 8 inside the []?

As in this:
const byte Box[] = {2, 3, 4, 5, 6, 9, 10, A0};

or this?:
const byte Box[8] = {2, 3, 4, 5, 6, 9, 10, A0};

8

The compiler is smart enough to figure out how many elements there are.

9

Awesome. Thank you both for putting up with my admittedly noob question!

The end project is a gag gift that needs to play little music files from a separate box. I'll be sure to post it in the Exhibition section when it's done. Thanks again for the help!