exit status 1 expected initializer before 'void'-Completed

wpage97 · February 19, 2017, 1:03pm

My code is coming up with a error saying 'expected initializer before 'void''
I'm fairly new to C++ and was wondering if someone could help me out with this?
Here is my Code

int temp //A0 producing 4 volts
#define start_button 2 // #define any text saying start_button will be replaced with (port)2
#define LED1 3 // #define any text saying LED1 will be replaced with (port)3
#define heater_element 4 // #define any text saying heater_element will be replaced with (port)4
#define LED2 5 // #define any text saying LED2 will be replaced with (port)5
#define LED3 6 // #define any text saying LED3 will be replaced with (port)6
#define piezo_buzzer 7 // #define any text saying piezo_buzzer will be replaced with (port)7

void setup()
{
pinMode(LED1,OUTPUT); //listing all pin outputs and speed of communication
Serial.begin(9600);
pinMode(heater_element,OUTPUT);
Serial.begin(9600);
pinMode(LED2,OUTPUT);
Serial.begin(9600);
pinMode(LED3,OUTPUT);
Serial.begin(9600);
pinMode(piezo_buzzer,OUTPUT);
Serial.begin(9600);
}
void loop()
{
digitalRead(start_button,HIGH) //starting machine
{
digitalWrite(LED1,HIGH); //turning on 'started' LED
Serial.println("Started cooking process");
}
}

system · February 19, 2017, 1:09pm

Look at your very first line.

Please remember to use code tags when posting code.

JavierN · February 19, 2017, 1:10pm

Hi! I'm fairly new myself so there might be a good reason, but why are you using Serial.begin so many times?

groundFungus · February 19, 2017, 1:13pm

Then there is this line. Look in the reference at digitalRead. And missing a semi-colon.

digitalRead(start_button,HIGH)

system · February 19, 2017, 1:13pm

(deleted)

Gabriel_swe · February 19, 2017, 1:22pm

groundfungus:
Then there is this line. Look in the reference at digitalRead. And missing a semi-colon.
digitalRead(start_button,HIGH)

Naah, looking at the next few lines I dont think a semi-colon is missing.
More likely a missing if and equal signs.

if (digitalRead(start_button)==HIGH)

wpage97 · February 19, 2017, 2:04pm

That was helpful thank you but the error is still appearing, it says I need an initalizer before 'void' but I'm unsure as to what is meant

system · February 19, 2017, 2:04pm

Post your code.
Use code tags.

wpage97 · February 19, 2017, 2:11pm

int temp //A0 producing 4 volts
#define start_button 2 // #define any text saying start_button will be replaced with (port)2
#define LED1 3 // #define any text saying LED1 will be replaced with (port)3
#define heater_element 4 // #define any text saying heater_element will be replaced with (port)4
#define LED2 5 // #define any text saying LED2 will be replaced with (port)5
#define LED3 6 // #define any text saying LED3 will be replaced with (port)6
#define piezo_buzzer 7 // #define any text saying piezo_buzzer will be replaced with (port)7

void setup()
{
  // initialize serial communication:
  Serial.begin(9600);
  // initialize pins:
  pinMode(LED1,OUTPUT);                       
  pinMode(heater_element,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(piezo_buzzer,OUTPUT);
}


void loop()
{
   if digitalRead(start_button==HIGH)                     //starting machine
 {
   digitalWrite (LED1,HIGH);                     //turning on 'started' LED
    Serial.println("Started cooking process");
  }
}

JavierN · February 19, 2017, 2:12pm

You need a semicolon in the first line.

int temp;

system · February 19, 2017, 2:12pm

Look again at your very first line.
I think I've already mentioned this.

system · February 19, 2017, 2:13pm

if digitalRead(start_button==HIGH) then take a look here.

wpage97 · February 19, 2017, 2:27pm

Here is the error code:

Arduino: 1.6.7 (Windows 10), Board: "Arduino/Genuino Uno"

Log_book_activity:20: error: expected initializer before 'void'

 void loop()

 ^

\\nasstudusers\4$\N0616240\My Documents\Arduino\Log_book_activity\Log_book_activity.ino: In function 'void loop()':

Log_book_activity:22: error: expected '(' before 'digitalRead'

    if digitalRead(start_button==HIGH)                        //starting machine

       ^

exit status 1
expected initializer before 'void'

  This report would have more information with
  "Show verbose output during compilation"
  enabled in File > Preferences.

and here is the corrections on the code(apologises for not seeing your original message):

int temp; //A0 producing 4V
#define start_button 2 // #define any text saying start_button will be replaced with (port)2
#define LED1 3 // #define any text saying LED1 will be replaced with (port)3
#define heater_element 4 // #define any text saying heater_element will be replaced with (port)4
#define LED2 5 // #define any text saying LED2 will be replaced with (port)5
#define LED3 6 // #define any text saying LED3 will be replaced with (port)6
#define piezo_buzzer 7 // #define any text saying piezo_buzzer will be replaced with (port)7

void setup()
{
  // initialize serial communication:
  Serial.begin(9600);
  // initialize pins:
  pinMode(LED1,OUTPUT);                       
  pinMode(heater_element,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(piezo_buzzer,OUTPUT);
}
void loop()
{
   if digitalRead(start_button==HIGH)                      //starting machine
 {
   digitalWrite (LED1,HIGH);                     //turning on 'started' LED
    Serial.println("Started cooking process");
  }
}

JavierN · February 19, 2017, 2:31pm

the if statement should look like this:

if (digitalRead(start_button)==HIGH)

wpage97 · February 19, 2017, 2:39pm

I've corrected that but the original error still is coming up

JavierN · February 19, 2017, 2:43pm

I've copied your code and fixed the if statement and it compiles fine.
Do you want to post it once more and I'll try to compile it again?

wpage97 · February 19, 2017, 4:45pm

I've sorted that issue out now but am now having another problem! I've created a nested loop and I want it to break that loop once 10 minutes has elapsed! Here is my code:

int temp; //A0 producing 4V
#define start_button 2 // #define any text saying start_button will be replaced with (port)2
#define LED1 3 // #define any text saying LED1 will be replaced with (port)3
#define heater_element 4 // #define any text saying heater_element will be replaced with (port)4
#define LED2 5 // #define any text saying LED2 will be replaced with (port)5
#define LED3 6 // #define any text saying LED3 will be replaced with (port)6
#define piezo_buzzer 7 // #define any text saying piezo_buzzer will be replaced with (port)7

void setup()
{
  // initialize serial communication:
  Serial.begin(9600);
  // initialize pins:
  pinMode(LED1,OUTPUT);                       
  pinMode(heater_element,OUTPUT);
  pinMode(LED2,OUTPUT);
  pinMode(LED3,OUTPUT);
  pinMode(piezo_buzzer,OUTPUT);
}

void loop()
{
   if (digitalRead(start_button)==HIGH)                      //starting machine
 {
   digitalWrite (LED1,HIGH);                     //turning on 'started' LED
   Serial.println("Started cooking process");
   delay(5000);                                   //delay for 5 seconds 
  }
   if (analogRead(temp)<=4.5)
   {
   digitalWrite (heater_element,HIGH);           //turing on heater
   digitalWrite (LED2,HIGH);                     //turning on 'Boiling' LED
   Serial.println("Started to boil");
   delay(5000);                               
   }
   while (analogRead(temp)>4.5)
   {
   digitalWrite (heater_element,LOW);                     //turning off heating element
   Serial.println("Water Boiled");                                                     
   }
   do 
   {
    if (analogRead(temp)>4.5)
    {
      break;
    }
    else
    {
    digitalWrite (heater_element,HIGH);
    delay(10000); 
    digitalWrite (heater_element,LOW);
    delay(50000);
    }
   }
   while(delay(600000));


}

JavierN · February 19, 2017, 5:06pm

I'm glad you got that working!
I'm happy to help but you probably need to start a new thread with the new issue and mark this one as complete.
That way everyone can pitch in! I'll keep an eye out for it.

wpage97 · February 19, 2017, 5:11pm

Will do thank you!

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exit status 1 expected initializer before 'void'-Completed

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