DV04
February 5, 2020, 5:59am
1
// constants won't change. They're used here to
int buttonPin = 3 ; // the number of the pushbutton pin
// variables will change:
// initialize the LED pin as an output:
// initialize the pushbutton pin as an input:
while (True) {
// read the state of the pushbutton value:
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
else {
}
I am coming against :
error: expected constructor, destructor, or type conversion before '(' token pinMode(ledPin, OUTPUT) ^
Failed to compile file code.cpp
arduino build failed.
Please see the attachment for code details
system
February 5, 2020, 6:04am
2
I can't speak for anyone else, but that's totally indecipherable to me.
Please just put the code as text in a post, suitably tagged of course.
system
February 5, 2020, 6:11am
3
Your code has no setup() or loop() functions: Have a look at any of the File > Examples.
If you go File > New you'll get a template.
system
February 5, 2020, 6:17am
4
I'm confused: although I can't read the words in the screenshot, its structure looks like it has setup() and loop(), yet the code which you added to the opening post while I was posting #1 , has no setup() or loop().
So why don't you, in a new post below this, post the code as is, in code tags for a fresh start...
DV04
February 5, 2020, 6:23am
5
This is the Whole code written by me
/*
Turns on and off a light emitting diode(LED) connected to digital
The circuit:
LED attached from pin 11 to ground
pushbutton attached to pin 3 from +5V
// constants won't change. They're used here to
int buttonPin = 3 ; // the number of the pushbutton pin
int ledPin = 11 ; // the number of the LED pin
// variables will change:
int buttonState = 0 ; // variable for reading the pushbutton status
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT)
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT)
while (True) {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin)
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH)
}
else {
// turn LED off:
digitalWrite(ledPin, LOW)
}
system
February 5, 2020, 6:28am
6
It has no setup() or loop()...
DV04
February 5, 2020, 6:33am
7
Is it okay Now?
// constants won't change. They're used here to
const int buttonPin = 3; // the number of the pushbutton pin
const int ledPin = 11; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
} else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
system
February 5, 2020, 6:37am
8
Is it okay Now?
Does it compile? If so does it do what you want?
Here it is in tags for readability:
// constants won't change. They're used here to
// set pin numbers:
const int buttonPin = 3; // the number of the pushbutton pin
const int ledPin = 11; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
} else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}
