Question

Write code using the Arduino IDE that compiles with no errors.

2-bit adder: The code must read two digital input signals and turn on two LEDS as needed to show the sum of the inputs. e.g. 0 + 1 = 01.

Answer 1

Arduino code:-

int b=0;

int a=0;

const int input1 = 2;
const int input2 =3;
const int ledPin1 = 7;
const int ledPin2 = 8;

void setup()
{
  
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(input1, INPUT);
pinMode(input2, INPUT);
  
}

void loop() {

b = digitalRead(input2);
a= digitalRead(input1);

if (a==LOW && b== LOW) {
  
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
}
  
else if (a== LOW && b== HIGH) {
  
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, HIGH);
}
else if (a== HIGH && b== LOW) {

digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, HIGH);
}
else if (a== HIGH && b== HIGH) {
  
digitalWrite(ledPin1, HIGH);
digitalWrite(ledPin2, LOW);
}
  
}

Done compiling without compilation errors: