LiquidCrystal library stopped working

Using Arduino Programming Questions
#1

So i was just programming something like an alarm clock and everything was working fine and then suddenly i get an error that for some reason disables the LiquidCrystal library. (I think this is what happens anyways as i get an error for everything with lcd. or LiquidCrystal in it)

Sorry for posting whole code but i dont know what to remove to make it shorter.

Error msg:
Arduino: 1.6.1 (Windows 8.1), Board: “Arduino Uno”

In file included from Alarm_Clock_Project.ino:19:0:

C:\Program Files (x86)\Arduino\libraries\LiquidCrystal\src/LiquidCrystal.h:45:1: error: expected ‘,’ or ‘;’ before ‘class’

class LiquidCrystal : public Print {

^

Alarm_Clock_Project.ino:20:1: error: ‘LiquidCrystal’ does not name a type

Alarm_Clock_Project.ino: In function ‘void setup()’:

Alarm_Clock_Project.ino:32:3: error: ‘lcd’ was not declared in this scope

Alarm_Clock_Project.ino: In function ‘void loop()’:

Alarm_Clock_Project.ino:50:3: error: ‘lcd’ was not declared in this scope

Alarm_Clock_Project.ino: In function ‘void minute()’:

Alarm_Clock_Project.ino:75:7: error: ‘lcd’ was not declared in this scope

Alarm_Clock_Project.ino: In function ‘void hour()’:

Alarm_Clock_Project.ino:86:7: error: ‘lcd’ was not declared in this scope

Alarm_Clock_Project.ino:93:7: error: ‘lcd’ was not declared in this scope

Error compiling.

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const int button1=6; 
const int button2=7;
const int button3=8;
const int button4=9;

  int zero = 0;
  int y = 0;
  int x = 0;
  int z = 0;

const int secondchange=60;
const int minutechange=60;
const int hourchange=24;

const int buzzerpin = 13;

int changeState = 0

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  Serial.begin(9600);
  
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);  
  pinMode(button3, INPUT);
  pinMode(button4, INPUT);
  
  pinMode(buzzerpin, OUTPUT);
  
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0,1);
  lcd.print("test");
}

void loop() {
  int button1State, button2State, button3State;
  button1State = digitalRead(button1);
  button2State = digitalRead(button2);
  button3State = digitalRead(button3);
  
  Serial.print(y);

  second();
  minute();
  hour();
    
  lcd.setCursor(0,0);
  lcd.print(z);
  lcd.setCursor(3,0);
  lcd.print(":");
  lcd.setCursor(4,0);
  lcd.print(x);
  lcd.setCursor(7,0);
  lcd.print(":");
  lcd.setCursor(8,0);
  lcd.print(y);
  
  State();
 
}
 
void second(){
  delay(1000);
  ++y; 
}  
 
void minute(){
  if (y == 60)
    {
      ++x;
      y = 0;
      lcd.setCursor(9,0);
      lcd.print("   ");
    }

}

void hour(){
  if (x == 60)
    {
      ++z;
      x = 0;
      lcd.setCursor(4,0);
      lcd.print("  ");
      
    }
  if (z == 24)
    {
      z = 0;
      lcd.setCursor(0,0);
      lcd.print("  ");
    }
}
      
void State(){
 int button1State, button2State, button3State;
 button1State = digitalRead(button1);
 button2State = digitalRead(button2);
 button3State = digitalRead(button3);
  
 if (button1State == LOW)
   {
     changeState = 1;
   }
 else
   { 
     changeState = 0;
   }

 if ((changeState == 1) && (button1State == LOW))
   {
     changeState = 2;
   }
 else
   {
     changeState = 1;
   }
}
#2

int changeState = 0

#include <LiquidCrystal.h>

Hmmm, expected ‘;’ before class… the class is in the header.

#3

Oh wow lol. Guess i need to check over the code a little better :confused: Thanks for help.

#4

This is a nice example of a common "Gotcha"

When you get an error message that doesn't make sense... in this case the compiler was whining about the "LiquidCrystal" line, where nothing was wrong, always remember to look at the code JUST BEFORE the bit the compiler is marking as faulty. Sometimes, as here, an error ABOVE the complained-about prevents the compiler from understanding something, because of its context.

===
Tutorials, ideas, etc, at...

#5