联想校园招聘笔试题

以下程序的功能最可能实现的是哪个？ const int greenLedPin = 3; const int redLedPin = 4; const int switchPin = 7; void setup() { pinMode(greenLedPin, OUTPUT); pinMode(redLedPin, OUTPUT); pinMode(switchPin, INPUT); Serial.begin(9600); } void loop() { int switchValue = 0; switchValue = digitalRead(switchPin); Serial.print(" Value of switch = "); Serial.println(switchValue); if (switchValue == 0) { digitalWrite(redLedPin, HIGH); digitalWrite(greenLedPin, LOW); } else { digitalWrite(redLedPin, LOW); digitalWrite(greenLedPin, HIGH); } }