#define sw1 34
#define sw2 35
#define sw3 26
#define led1 21
#define led2 5
#define led3 2
int val1,val2,val3;
void setup() {
  Serial.begin(115200);
  pinMode(sw1, INPUT_PULLUP);
  pinMode(sw2, INPUT_PULLUP);
  pinMode(sw3, INPUT_PULLUP);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}

void loop() {
  val1=(digitalRead(sw1));
  val2=(digitalRead(sw2));
  val3=(digitalRead(sw3));
  Serial.print("sw1 = ");
  Serial.print(val1);
  Serial.print(" : ");
  Serial.print("sw2 = ");
  Serial.print(val2);
  Serial.print(" : ");
  Serial.print("sw3 = ");
  Serial.println(val3);
  digitalWrite(led1,!val1);
  digitalWrite(led2,!val2);
  digitalWrite(led3,!val3);
}