gistfile1.ino

/*
Design a circuit and write a test program, using the Arduino Nano, 
that will test two input Transistor-Transistor Logic (TTL) gates 
including AND, OR, NAND, NOR and XOR.
*/
//initialize variable
int x=0;
int output = digitalRead(2);
int output2 = digitalRead(3);
 void setup();
 {
   pinMode (2, OUTPUT);
   pinMode (3, OUTPUT);
   pinMode (8, INPUT);
   pinMode (9, INPUT);
   pinMode (10, INPUT);
   pinMode (11, INPUT); 
 }
 
 {
 if((output == LOW) & (output2 == LOW)){
 digitalWrite(8) 
 }
 x == int 1;
 }
 
  {
 if{ 
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(8, HIGH);
 }
 x == (x + int 2);
 }
 
  {
 if{ 
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(8, HIGH);
 }
 x == (x + int 4);
 }