Example debouncing code for arduino

example.c

#define FIRST_PIN_TO_READ 2
#define LAST_PIN_TO_READ 12
#define COUNT_OF_PINS_READ 11 // There are 11 pins between pin 2 and including pin 12

char currentInputStates[COUNT_OF_PINS_READ], previousInputStates[COUNT_OF_PINS_READ];

// It would be a good idea to name functions in lowercase, i.e. inputs() as CONSTANTS are usually uppercase
void INPUTS() {
    for (char pin = FIRST_PIN_TO_READ; pin <= LAST_PIN_TO_READ; pin++) {
        char pinArrayIndex = pin - FIRST_PIN_TO_READ; // Arrays are zero based, the index for pin 2 is 0
        currentInputStates[pinArrayIndex] = digitalRead(pin);

        if (currentInputStates[pinArrayIndex] == LOW && currentInputStates[pinArrayIndex] != previousInputStates[pinArrayIndex]) {
            switch (pin) {
                case 12: //Toggles Comm1
                    Serial.println ("A45");
                    break;
                case 11: //Toggles Comm2
                    Serial.println ("A46");
                    break;
                case 10: //Toggle Comm1/2
                    Serial.println ("A47");
                    break;
                case 9://Toggle Nav1
                    Serial.println ("A48");
                    break;
                case 8: //Toggle Nav2
                    Serial.println ("A49");
                    break;
                case 7: //Toggle ADF
                    Serial.println ("A52");
                    break;
            }
        }

        previousInputStates[pinArrayIndex] = currentInputStates[pinArrayIndex];
    }
}