Expected Unqualified ID

Projects Programming
1

When I put in some code, I got this error:

expected unqualified-id before numeric constant

Heres my Code:

/*Electric Building Unit: Science: 2019*/

const int buttonOne, 2);
const int buttonTwo, 3);      //redefining the names.

void setup() { 
  pinMode(buttonOne, INPUT);   
  pinMode(buttonTwo, INPUT);
  pinMode(buttonThree, INPUT);
  pinMode(buttonFour, INPUT);       //all of these are being set to input.
}

Serial.begin    //starts the serial monitor

void loop() {
  if(buttonOne==HIGH&&!LOW){          
    Serial.print("It's button 1!");   //detecting if button 1 is high, if so, it prints in the serial.
  }
  else{
    if(buttonTwo==HIGH&&!LOW){
      Serial.print("It's button 2!");  //same as before, with button 2.
    }
  }
}

Does anyone know why I am getting an error and what it means?

2

There are several problems with the code you've posted. Good job for putting it in code tags, most people don't bother to do that on their first post.

const int buttonOne, 2);
const int buttonTwo, 3);      //redefining the names.

This isn't the correct way to define constants. Here is the reference page that shows you how to do it.

void setup() { 
  pinMode(buttonOne, INPUT);   
  pinMode(buttonTwo, INPUT);
  pinMode(buttonThree, INPUT);
  pinMode(buttonFour, INPUT);       //all of these are being set to input.
}

How many buttons have you defined at the start of your code? How does that compare to the amount of buttons you're trying to set as inputs here?

Serial.begin    //starts the serial monitor

This line definitely needs to be fixed.

void loop() {
  if(buttonOne==HIGH&&!LOW){          
    Serial.print("It's button 1!");   //detecting if button 1 is high, if so, it prints in the serial.

There is an example in the IDE that demonstrates how to read a button press. Have a quick look at it- there's no real reason to compare the button state to HIGH or not LOW. It is superfluous.

That should help with the compilation error.s