refactored for more dynamic pin count

Author: campbell-codes

arduino_button_sketch/arduino_button_sketch.ino

@@ -1,39 +1,29 @@
-// constants won't change. They're used here to set pin numbers:
-const int buttonPinA = 2;
-const int buttonPinB = 3;
-const int buttonPinC = 4;
-const int buttonPinD = 5;
-const int ledPin =  13;      // the number of the LED pin
-
-// variables will change:
-int buttonStateA = 0;         // variable for reading the pushbutton status
-int buttonStateB = 0;
-int buttonStateC = 0;
-int buttonStateD = 0;
+int buttonPins[] = {2, 3, 4, 5};
+int buttonPinsCount = 4;
+const int outputPin =  13;
+int sequence[]= {3, 5, 2, 4};
+int correctGuesses = 0;
 
 void setup() {
-  // initialize the LED pin as an output:
-  pinMode(ledPin, OUTPUT);
-  // initialize the pushbutton pin as an input:
-  pinMode(buttonPinA, INPUT);
-  pinMode(buttonPinB, INPUT);
-  pinMode(buttonPinC, INPUT);
-  pinMode(buttonPinD, INPUT);
+  for(int i=0; i < buttonPinsCount; i++){
+    pinMode(buttonPins[i], INPUT);
+  }
+  pinMode(outputPin, OUTPUT);
 }
 
 void loop() {
-  // read the state of the pushbutton value:
-  buttonStateA = digitalRead(buttonPinA);
-  buttonStateB = digitalRead(buttonPinB);
-  buttonStateC = digitalRead(buttonPinC);
-  buttonStateD = digitalRead(buttonPinD);
-
-  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
-  if (buttonStateA == HIGH || buttonStateB == HIGH || buttonStateC == HIGH || buttonStateD == HIGH) {
-    // turn LED on:
-    digitalWrite(ledPin, HIGH);
-  } else {
-    // turn LED off:
-    digitalWrite(ledPin, LOW);
+  bool inputRegistered = false;
+  for(int i=0; i < buttonPinsCount; i++){
+    int pin = buttonPins[i];
+    int pinState = digitalRead(pin);
+    if (pinState == HIGH){
+      digitalWrite(outputPin, HIGH);
+      inputRegistered = true;
+      break;
+    }
+  }
+  
+  if(!inputRegistered){
+    digitalWrite(outputPin, LOW);
   }
 }