VSC . Arduino IDE C++编译失败

Question

你能告诉我一个错误吗。我有arduino nano的代码，这个代码编译在Arduino IDE上！但是在VSC上不工作，'ai0‘在这个范围中没有声明，'ai1’在这个作用域中没有声明，没有声明。

void setup() {
Serial.begin (9600);

pinMode(2, INPUT_PULLUP); // internal pullup input pin 2 

pinMode(3, INPUT_PULLUP); // internalเป็น pullup input pin 3
//Setting up interrupt
//A rising pulse from encodenren activated ai0(). AttachInterrupt 0 is DigitalPin nr 2 on moust Arduino.
attachInterrupt(0, ai0, RISING);
 
//B rising pulse from encodenren activated ai1(). AttachInterrupt 1 is DigitalPin nr 3 on moust Arduino.
attachInterrupt(1, ai1, RISING);
}
 
void loop() {
// Send the value of counter
if( counter != temp ){
Serial.println (counter);
temp = counter;
}
}
 
void ai0() {
// ai0 is activated if DigitalPin nr 2 is going from LOW to HIGH
// Check pin 3 to determine the direction
if(digitalRead(3)==LOW) {
counter++;
}else{
counter--;
}
}
 
void ai1() {
// ai0 is activated if DigitalPin nr 3 is going from LOW to HIGH
// Check with pin 2 to determine the direction
if(digitalRead(2)==LOW) {
counter--;
}else{
counter++;
}
}``

Answer 1

#include <Arduino.h>

void ai0() {
// ai0 is activated if DigitalPin nr 2 is going from LOW to HIGH
// Check pin 3 to determine the direction
if(digitalRead(3)==LOW) {
counter++;
}else{
counter--;
}
}
 
void ai1() {
// ai0 is activated if DigitalPin nr 3 is going from LOW to HIGH
// Check with pin 2 to determine the direction
if(digitalRead(2)==LOW) {
counter--;
}else{
counter++;
}

void setup() {
Serial.begin (9600);

pinMode(2, INPUT_PULLUP); // internal pullup input pin 2 

pinMode(3, INPUT_PULLUP); // internalเป็น pullup input pin 3
//Setting up interrupt
//A rising pulse from encodenren activated ai0(). AttachInterrupt 0 is DigitalPin nr 2 on moust Arduino.
attachInterrupt(0, ai0, RISING);
 
//B rising pulse from encodenren activated ai1(). AttachInterrupt 1 is DigitalPin nr 3 on moust Arduino.
attachInterrupt(1, ai1, RISING);
}
 
void loop() {
// Send the value of counter
if( counter != temp ){
Serial.println (counter);
temp = counter;
}
}