#include <SPI.h>
#define NUMBER 4
int input_pin[NUMBER] = {3, 4, 5, 6};
byte current_state[NUMBER] = {0};

char nextChar;
int tmp;
//const byte set_pass[]={7,7,7}; // The DTMF Value for 4 Digits of Password
//byte recvd_pass[3]; // a variable to store the password received
int StD = 2; //i added
int val = 0; //i added
int keypressed;
//char result;
int count = 0; //was pwdlvl
int i = 0;
//char password = ("7");
//int interpret;

 // pinMode(2,INPUT); // Steered delay Pin (INT 0)
 // pinMode(3,INPUT); // q1
 // pinMode(4,INPUT); // q2
 // pinMode(5,INPUT); // q3
 // pinMode(6,INPUT); // q4 //was pin 1
 // attachInterrupt(0,dtmf,RISING);
  
//}

//byte value = 0;
    
void setup() {
  pinMode(StD, INPUT); // i added
  Serial.begin(9600);
  //for (int i = 0; i < NUMBER; i++) pinMode(input_pin[i], INPUT);
  
}
/*
  0000=needs to be ignored. The default state of the inputs will be 0000.
  0001= 1 through 1000 = 8
*/
void loop() {
  int value = 0;
    
  //The first part of the loop is meant to recognize the state change of the inputs.
  for (int a = 0; a < 4; a++) {
    current_state[a] = digitalRead(input_pin[a]);
    value = value * 2 + current_state[a];
     
    //save the new data to the SD card
     //for (byte a = 0; a < 4; a = a + 1) {
     //Serial.println(current_state[a]);
   //}
    //tell the bench the state has been changed
    // Serial.println(current_state[a]);
    // delay(1000);
  }
  //Serial.print ("Global state : ");
    
  //Serial.print(value);
  //delay(1000);

   int toneHeard = digitalRead(StD);
   if (toneHeard == HIGH) {
   delay(250);
   keypressed = (value);
   Serial.print(keypressed);
   //password.append(keypressed);
   count++; // worked
     
           
  }
     //pwdlvl++; // increment count 
     if(count==3){ // if count is 4, then we need to match the password received to the passwors stored
         //if(recvd_pass[0]==set_pass[0] && recvd_pass[1]==set_pass[1] && recvd_pass[2]==set_pass[2]; //&& recvd_pass[3]==set_pass[3]) // check if passwords match
        val=0;

                // 'modified' will be your desired output
                
        //}
        //if (pwdlvl == 3){ 
        //Serial.println();
        Serial.print("pass3.. ");
        //Serial.print(value);
        delay(500);
        //Serial.print (i); //I added // if matched set the login flag

        //if (password.evaluate()){
        //    Serial.println("Valid Password");
        //value = 0;
        count = 0;
        
      } 
    
       
        
}