Switch/Case code example

#define ldrPin A0
#define potPin A1
#define led1Pin 7
#define led2Pin 8
int ldrValue = 0;
int potValue = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(ldrPin, INPUT);
  pinMode(potPin, INPUT);
}

void loop() {
//  int ldrState;
//  int potState;
  // put your main code here, to run repeatedly:
  ldrValue = analogRead(ldrPin);
  potValue = analogRead(potPin);
 /*
  if (ldrValue > 850) ldrState = 1;
  else ldrState = 0;
  if (potValue > 400) potState = 1;
  else potState = 0;
*/
  int state = (int)(ldrValue > 850) * 2 + (int)(potValue > 400);

  switch (state) {
    case 0:
      digitalWrite(led1Pin, LOW);
      digitalWrite(led2Pin, LOW);
      break;
    case 1:
      digitalWrite(led1Pin, HIGH);
      digitalWrite(led2Pin, LOW);
      break;
    case 2:
      digitalWrite(led1Pin, LOW);
      digitalWrite(led2Pin, HIGH);
      break;
    case 3:
      digitalWrite(led1Pin, LOW);
      digitalWrite(led2Pin, LOW);
      break;
  }
}