如何解决 analogRead()函数读取到的模拟值不准确的问题

const int analogPin = A0;
const int numReadings = 10;
int readings[numReadings];
int readIndex = 0;
int total = 0;
int average = 0;
void setup() {
Serial.begin(9600);
}
void loop() {
// 读取模拟值并存储在数组中
readings[readIndex] = analogRead(analogPin);
total = total + readings[readIndex];
readIndex++;
if (readIndex >= numReadings) {
readIndex = 0;
average = total / numReadings;
Serial.println(average);
total = 0;
}
delay(10);
}