/*Write a program to interface LCD and keypad (4 X 4) , to exhibit the 
functionality of a basic calculator.
1 2 3 4
5 6 7 8
9 0 + -   */
//  / * Clear Enter
#include <LiquidCrystal.h>
#include <Keypad.h>
int key;
int rPins;
int cPins;
byte ROWS=4;
byte COLS=4;
char [ROWS][COLS]={
  {'1','2','3','4'},
  {'5','6','7','8'},
  {'9','0','+','-'},
  {'/','*','clear','enter'}
  };
  Keypad keypad =Keypad(makeKeymap(key),rPins,cPins,ROWS,COLS);
  int rs=12,en=11,d4=5,d5=4,d6=3,d7=2;
  LiquidCrystal lcd(rs,en,d4,d5,d6,d7);
  void setup() {
    Serial.begin(9600);
    lcd.begin(16,2);
    lcd.print("hello");
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
  char key=keypad.getKey();
  if(key!=NO_KEY){
  Serial.println(key);
  }
  lcd.setCursor(0,1);
}