How to read switches via serial port C++?

Question

I have an arduino nano. I want to connect MX Cherry switches and detect pressing throught the serial port. What pins should i use on arduino and what code should be uploaded to the plate?

I understand that i have to power the switches so there has to be 5v pin and input pin. But i'm new to electronics so i didn't manage to figure it out.

//that's just basic code for sending a number every second via 13 pin
int i=0;
void setup() {
  Serial.begin(57600);
  pinMode(13, OUTPUT);
}
void loop() {
  i = i + 1;
  Serial.println(i);
  delay(1000);
}

Basically, i need a way of sending '1' if button is pressed and '0' if it's not.

Answer 1

Perhaps I've misunderstood your question. Why not just read the button and send a '1' if pressed and '0' if not?

void loop(){
  int buttonState = digitalRead(buttonPin);

  // Assumes active low button
  if (buttonState == LOW){
     Serial.print('1');
  } 
  else {
     Serial.print('0');
  }
  delay(500);
}

Of course you probably want to add some sort of timing to that so it doesn't send thousands of 0's and 1's per second. I added a delay, but that might not be the best answer for the application you have (and chose not to share). I've also assumed that your button is wired active-LOW with a pull-up since you didn't share that either.