int tens, ones;
int temp1,temp2,temp4,temp8;

void setup() {
pinMode(2, INPUT); //the one spot of BCD (ONES)
pinMode(3, INPUT); //the two spot of BCD (ONES)
pinMode(4, INPUT); //the four spot of BCD (ONES)
pinMode(5, INPUT); //the eight spot of BCD (ONES)

// pinMode(6 to 10) inputs - same as above but for the tens digit
Serial.begin(9600);
}

void loop() {
//you would probably read the tens digit first...it may not matter..


//Read the ONES digit
if (digitalRead(2)) { temp1 = 1; } else {temp1 = 0;} //if this is high it will set the bit to the number it should be
if (digitalRead(3)) { temp2 = 2; } else {temp2 = 0;}
if (digitalRead(4)) { temp4 = 4; } else {temp4 = 0;}
if (digitalRead(5)) { temp8 = 8; } else {temp8 = 0;}

ones = temp1 + temp2 + temp4 + temp8;

//Read the TENS digit the same as above with the same temp variables

tens = temp1 + temp2 + temp4 + temp8;

Serial.print(tens);
Serial.println(ones);

//If you need this as a number not two digits you could do something like this.

int number;
number = (tens*10) + ones;

Serial.println(tens);

}

//That is probably how I read the BCD switches...