#include expects "FILENAME" or <FILENAME>"

#include

#include <IRremote.h>
#include <IRremoteInt.h>

libraries\RobotIRremote\IRremoteTools.cpp
libraries\RobotIRremote\IRremoteTools.h

if(results.value == 16668839)     

          digitalWrite(led1, LOW);
       else
          digitalWrite(led1, HIGH);

int led1_on=0;
...
if(results.value == 16668839)
{if(led1_on) digitalWrite(led1, LOW);
else digitalWrite(led1, HIGH);
led1_on=!led1_on;
}

const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  13;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup()
{
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);     
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);   
}

void loop()
{
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH)
  {   
    // turn LED on:   
    digitalWrite(ledPin, HIGH); 
  }
  else
  {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
}