Need Advice on Reading Multiplexer Inputs

Projects Programming
3

Below is the code but it produces only a string output. I'm not sure how to work with it but then again I can't figure out how to generate a byte or integer.

int Zin = 12;  // input from multiplexer 
int Z = 0;
String poll;
int r0 = 0;   
int r1 = 0;   
int r2 = 0;   
int count = 0;   

void setup(){
  Serial.begin(9600);

  pinMode(Zin, INPUT);  // data from multiplexer
  pinMode(2, OUTPUT);    // s0
  pinMode(3, OUTPUT);    // s1
  pinMode(4, OUTPUT);    // s2
}

void loop () {

  for (count=0; count<=7; count++) {

    // select the bit  
    r0 = bitRead(count,0);    
    r1 = bitRead(count,1);    
    r2 = bitRead(count,2);  

    digitalWrite(2, r0);
    digitalWrite(3, r1);
    digitalWrite(4, r2);

    // read the input pin:
    int Z = digitalRead(Zin);
    poll = poll + Z;
  }
  print1();
  poll = 0;
} 

void print1 () {
  Serial.println(poll);
  delay(500);
}