全加器电路练习

void setup()
{
  pinMode(2, OUTPUT); 
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT); //CIN
  Serial.begin(9600);
}

void loop()
{
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  Serial.println("A=0, B=0, Cin=0");
  delay(2000);
  
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  Serial.println("A=0, B=0, Cin=1");
  delay(2000);
  
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  Serial.println("A=0, B=1, Cin=0");
  delay(2000);
  
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("A=0, B=1, Cin=1");
  delay(2000);
  
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  Serial.println("A=1, B=0, Cin=0");
  delay(2000);
  
  digitalWrite(2, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
  Serial.println("A=1, B=0, Cin=1");
  delay(2000);
  
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  Serial.println("A=1, B=1, Cin=0");
  delay(2000);
  
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("A=1, B=1, Cin=1");
  delay(2000);
   
}