int piezo = 7;
 
int button1 = 12;
int button2 = 3;
int button3 = 4;
 
#define A 262
#define B 294
#define C 330
#define D 349
#define E 392
#define F 440
#define G 466
#define H 523
 
int melody1[] = {C,B,A,B,C,C,C,B,B,B,C,E,E,C,B,A,B,C,C,C,B,B,C,B,A};
int tempo1[] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
int button[] = {2,3,12};
 
void setup() {
 
 
pinMode(piezo,OUTPUT);
 
pinMode(button1,INPUT);
pinMode(button2,INPUT);
pinMode(button3,INPUT);
 
for (int i = 0; i < 25; i++){
  
  int tempo = 250 *tempo1[i];
  
  button1 = digitalRead(button1);
 
  if(button1==HIGH){
  tone(piezo, melody1[i], tempo1);
  delay(tempo1[i]);
  noTone(piezo);}
}}

이게 코드입니다(미완성)

C:\Users\rhrla\AppData\Local\Temp\ccaxtaaP.ltrans0.ltrans.o: In function `main':

C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.19.0_x86__mdqgnx93n4wtt\hardware\arduino\avr\cores\arduino/main.cpp:46: undefined reference to `loop'

collect2.exe: error: ld returned 1 exit status

exit status 1
보드 Arduino/Genuino Uno 컴파일 에러.

이게 오류메세지입니다