Binary counting code issues

Using Arduino Programming Questions
1

Hi All!

I'm following along a tutorial via learn.inventr.io, Lesson #9, and I can't figure out either what I'm not following correctly or what they have incorrectly shown me, and how to fix it.

I'm using an Arduino Uno.

Upon verifying the error reads:
"compilation error: 'subtract_button' was not declared in this scope"

Below the first dotted lines is the whole error message. Below that, after the next dotted lines, is the whole code:

/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino: In function 'void loop()':
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:31:33: error: 'subtract_button' was not declared in this scope
ButtonIsPressed = digitalRead(subtract_button);
^~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:31:33: note: suggested alternative: 'subract_button'
ButtonIsPressed = digitalRead(subtract_button);
^~~~~~~~~~~~~~~
subract_button
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino: In function 'void addButtonPressed()':
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:49:10: error: 'OurSixBitNumber' was not declared in this scope
if(OurSixBitNumber[LED_Selector] == 1)
^~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:49:10: note: suggested alternative: 'OutSixBitNumber'
if(OurSixBitNumber[LED_Selector] == 1)
^~~~~~~~~~~~~~~
OutSixBitNumber
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino: In function 'void subButtonPressed()':
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:65:23: error: 'subtract_button' was not declared in this scope
while(digitalRead(subtract_button) == 1) {}
^~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:65:23: note: suggested alternative: 'subract_button'
while(digitalRead(subtract_button) == 1) {}
^~~~~~~~~~~~~~~
subract_button
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:73:10: error: 'OurSixBitNumber' was not declared in this scope
if(OurSixBitNumber[LED_Selector] == 0)
^~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:73:10: note: suggested alternative: 'OutSixBitNumber'
if(OurSixBitNumber[LED_Selector] == 0)
^~~~~~~~~~~~~~~
OutSixBitNumber
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:80:9: error: 'OurSixBitNumber_Selector' was not declared in this scope
OurSixBitNumber_Selector] = 0;
^~~~~~~~~~~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:80:9: note: suggested alternative: 'OutSixBitNumber'
OurSixBitNumber_Selector] = 0;
^~~~~~~~~~~~~~~~~~~~~~~~
OutSixBitNumber
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino: In function 'void writeLEDs()':
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:91:10: error: 'OurSixBitNumber' was not declared in this scope
if(OurSixBitNumber[temp] == 1)
^~~~~~~~~~~~~~~
/private/var/folders/mq/fqk5rd197k13n_48_czjdqb80000gn/T/.arduinoIDE-unsaved202485-2681-5f190b.nzuuq/sketch_sep5a/sketch_sep5a.ino:91:10: note: suggested alternative: 'OutSixBitNumber'
if(OurSixBitNumber[temp] == 1)
^~~~~~~~~~~~~~~
OutSixBitNumber

exit status 1

Compilation error: 'subtract_button' was not declared in this scope

Here is my code:

const int add_button=12,
subract_button=13,
NumberOfBits=6;

int OutSixBitNumber[]={0,0,0,0,0,0}, LED_Selector, ButtonIsPressed;

void setup() {
// put your setup code here, to run once:

pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);

pinMode(add_button, INPUT);
pinMode(subract_button, INPUT);

}

void loop() {
// put your main code here, to run repeatedly:

ButtonIsPressed = digitalRead(add_button);
if(ButtonIsPressed == 1) {addButtonPressed();}

delay(100);

ButtonIsPressed = digitalRead(subtract_button);
if(ButtonIsPressed == 1) {subButtonPressed();}

resetSelector();
writeLEDs();

}

void addButtonPressed() {

while(digitalRead(add_button) == 1) {}
  
  delay(100);
  resetSelector();

while(LED_Selector >= 0 && ButtonIsPressed != 0)
{
  if(OurSixBitNumber[LED_Selector] == 1)
  {
    OurSixBitNumber[LED_Selector] = 0;
    LED_Selector--;
  }
  else
  {
    OurSixBitNumber[LED_Selector] = 1;
    ButtonIsPressed = 0;
  }
}
}

void subButtonPressed() {

while(digitalRead(subtract_button) == 1) {}

delay(100);

resetSelector();

while(LED_Selector >= 0 && ButtonIsPressed != 0)
{
  if(OurSixBitNumber[LED_Selector] == 0)
  {
    OurSixBitNumber[LED_Selector] = 1;
    LED_Selector--;
  }
  else
  {
    OurSixBitNumber_Selector] = 0;
    ButtonIsPressed = 0;
  }
}

}

void writeLEDs() {

for(int temp = 0; temp < NumberOfBits; temp++)
{
  if(OurSixBitNumber[temp] == 1)
  
    digitalWrite(NumberOfBits - temp + 1, HIGH);

  else
  
    digitalWrite(NumberOfBits - temp + 1, LOW);
  
  LED_Selector--;
  }
}

void resetSelector() {
LED_Selector = NumberOfBits - 1;
}

2

So close. You posted the entire error message and your entire sketch, but you need to use the code tags to people can easily copy the sketch.
How to get the best out of this forum - Using Arduino / Installation & Troubleshooting - Arduino Forum

spelling matters

1 Like
3

OMG! Thank you. I corrected the 2 I found, plus helped me to see the other misspelled word "our", not "out", and found a missed "[LED_..."

YOU ARE MY HERO....Arduino HERO hehe

4

the error msg suggested what was the correct spelling