redefinition of 'int buzzer'

Projects Programming
1 
int button1 = 2;
int button2 = 3;
int button3 = 4;
int button4 = 5;
int button5 = 6;
int button6 = 7;
int buzzer = 8;
int led = 9;      //green LED
int led2 = 10;      //red LED

void setup()
{
  pinMode(button1,INPUT);
  pinMode(button2,INPUT);
  pinMode(button3,INPUT);
  pinMode(button4,INPUT);
  pinMode(button5,INPUT);
  pinMode(button6,INPUT);
  pinMode(buzzer,OUTPUT);
  pinMode(led,OUTPUT); 
  pinMode(led2,OUTPUT); 
}

void loop()
{
  if (digitalRead(button1) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,440);
  if (digitalRead(button1) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  if (digitalRead(button2) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,400);
  if (digitalRead(button2) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  if (digitalRead(button3) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,360);
  if (digitalRead(button3) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  if (digitalRead(button4) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,320);
  if (digitalRead(button4) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  if (digitalRead(button5) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,280);
  if (digitalRead(button5) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  if (digitalRead(button6) == HIGH) (
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,230);
  if (digitalRead(button6) == LOW) (
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  else (
  digitalWrite(led2,LOW);
  digitalWrite(led,LOW);
}

It says redefinition of 'int buzzer', I tried changing the pin to a PWM and even tried analog input for some reason. I got frustrated and tried it as a constant variable, but then I got a declaration error.

2 
  if (digitalRead(button1) == HIGH) (

That should be:

  if (digitalRead(button1) == HIGH) {

Ditto for a lot of other places.

3

It says redefinition of 'int buzzer',

Please copy and paste the exact error message. It would have a line number as part of it.

4

Ok thanks Nick Gammon, dont I also need to call no tone after each tone as well?

5 
/* Materials:   6 Buttons, Piezo Buzzer, 220 Ohm and 330 Ohm Resistors, I made a FZZ for it in documents.
*/


int button1 = 2;
int button2 = 3;
int button3 = 4;
int button4 = 5;
int button5 = 6;
int button6 = 7;
int buzzer = 8;
int led = 9;      //green LED
int led2 = 10;      //red LED

void setup()
{
  pinMode(button1,INPUT);
  pinMode(button2,INPUT);
  pinMode(button3,INPUT);
  pinMode(button4,INPUT);
  pinMode(button5,INPUT);
  pinMode(button6,INPUT);
  pinMode(buzzer,OUTPUT);
  pinMode(led,OUTPUT); 
  pinMode(led2,OUTPUT); 
}

void loop()
{
  if (digitalRead(button1) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,440);
  }
  if (digitalRead(button1) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  if (digitalRead(button2) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,400);
  }
  if (digitalRead(button2) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  if (digitalRead(button3) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,360);
  }
  if (digitalRead(button3) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  if (digitalRead(button4) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,320);
  }
  if (digitalRead(button4) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  if (digitalRead(button5) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,280);
  }
  if (digitalRead(button5) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  if (digitalRead(button6) == HIGH) {
  digitalWrite(led2,LOW);
  digitalWrite(led,HIGH);
  tone(buzzer,230);
  }
  if (digitalRead(button6) == LOW) {
  digitalWrite(led2,HIGH);
  digitalWrite(led,LOW);
  noTone(buzzer);
  }
  else {
  digitalWrite(led2,LOW);
  digitalWrite(led,LOW);
  }
}

I did the changes and I called noTone(buzzer) after each time in the loop that the program reads the button as LOW. After making such changes, it worked, Thank you for the help Nick!