int A,B,C,D,E,F,G,H,AB,AC,AE;
#define out1 2
#define out2 3
#define out3 4
#define in 5
#define button 10

void setup()
{
  pinMode(out1, OUTPUT);
  pinMode(out2, OUTPUT);
  pinMode(out3, OUTPUT);
  pinMode(in, INPUT);
  pinMode(button, INPUT);
  digitalWrite(button, HIGH);
  Serial.begin(9600);
  Serial.println("Serial begin.");
}
void loop()
{
  if (digitalRead(button) == LOW) {
    READ;
    CONV;
    DISP;
  }
}


void READ()
{

  digitalWrite(out1, LOW);
  digitalWrite(out2, LOW);
  digitalWrite(out3, LOW);
  A = digitalRead(in);       //A'B'C'
  digitalWrite(out1, HIGH);
  B = digitalRead(in);       //AB'C'
  digitalWrite(out1, LOW);
  digitalWrite(out2, HIGH);
  C = digitalRead(in);       //A'BC'
  digitalWrite(out1, HIGH);
  D = digitalRead(in);       //ABC'
  digitalWrite(out1, LOW);
  digitalWrite(out2, LOW);
  digitalWrite(out3, HIGH);
  E = digitalRead(in);       //A'B'C
  digitalWrite(out1, HIGH);
  F = digitalRead(in);       //AB'C
  digitalWrite(out1, LOW);
  digitalWrite(out2, HIGH);
  G = digitalRead(in);       //A'BC
  digitalWrite(out1, HIGH);
  H = digitalRead(in);       //ABC

}

void CONV()
{
  if (A == HIGH & B == HIGH) {    //If A'B'C' and AB'C'
    AB = HIGH;                    //then B'C' is true
  }
  if (A == HIGH & C == HIGH) {    //If A'B'C' and A'BC'
    AC = HIGH;                    //then A'C' is true
  }
  if (A == HIGH & E == HIGH) {    //If A'B'C' and A'B'C
    AE = HIGH;                    //then A'B' is true
  }
  if (A == true){
}
}

void DISP()
{

 if (A == true)  {
   Serial.println("A true");
 }
 if (B == true)  {
   Serial.println("B true");
 }
 if (C == true)  {
   Serial.println("C true");
 }
 if (D == true)  {
   Serial.println("D true");
 }
 if (E == true)  {
   Serial.println("E true");
 }
 if (F == true)  {
   Serial.println("F true");
 }
 Serial.print(B);
 Serial.print(C);
 Serial.print(D);
 Serial.print(E);
 Serial.print(F);
 Serial.print(G);
 Serial.print(H);

}