Arduino project 7 Keyboard code

I would not consider myself an expert, but the book must be wrong.

If those two statements exist in the same program, then yes you are attempting to declare the variable buttons twice.

The first statement declares an array of 6 integers.

In the second statement, you want to assign the value 2 to the first element (index 0) of the array.

The inclusion of the "int" before the assignment causes the problem.

If you remove the "int" then the statement becomes an assignment statement, instead of a declaration statement.

I hope this helps.

Larry

Hi Larry

thanks for the response, I had a feeling it didn't look correct. also i tried to remove the int from buttons[0] = 2 and i still get an error. this time it tells me it was expecting something before the '='. i would copy and paste the error but i'm currently at work so it would have to wait till i get home.

but if you know what im doing wrong please let me know.

Thanks

Erny

Erny

There is a discussion here Project 07 Keyboard Instrument - Arduino Forum about it.

You do need to drop the int, as you have already defined buttons as a 7 element array (0-6)

Just make sure the buttons[0] is a zero not a Ohh by mistake.

Mark

edit: array should be 7 elements 0-6 ....Mark

thanks Mark that is very useful!

i'm sorry, but I got the same problem with this 2  fuc**** lines,  and I tried what you have all said (sorry my english isn't very good i'm french. I hope you understand) but it still doesn't work, here is my code:

int buttons[6];

int buttons[0] = 2;

int notes[] = {262, 294, 330, 349};

void setup() {

  Serial.begin(9600);

}

void loop () {

  int keyVal = analogRead(A0);

  Serial.println(keyVal);

if (keyVal == 1023){

    tone(8, notes[0]);

  }

  else if (keyVal >= 990 && keyVal <= 1010) {

    tone(8, notes[1]);

  }

  else if(keyVal >= 505 && keyVal <= 515) {

    tone(8, notes[2]);

  }

  else if(keyVal >= 5 && keyVal <= 10) {

    tone(8, notes[3]);

  }

  else{

    noTone(8);

  }

}

ive tried tu cut the "int" on the second line, but like erny, it tells me " expected constructor, destructor, or type conversion before '=' token"

i've made sure that my 0  isn't an o, and it still doesn't work.

please help me

Reading through the comments on the link mcb1 posted, you could remove the first two lines (or comment out) since these variables are not used anywhere else in the code.

Frederick

Reading through the comments on the link mcb1 posted, you could remove the first two lines (or comment out) since these variables are not used anywhere else in the code.

Frederick