Having trouble with my program

Hi,
I’m just starting to program my arduino and I’m getting this error. I have no previous programming experience.

Can anyone shed some light as to what I’m missing.

I’m trying to read a variable and display it on the LCD dispaly instead of the PC using the serial port monitor.

Thank you for your help.

Arduino: 1.6.4 (Windows 7), Board: “Arduino Uno”

Arduino_sensor_ultrasonico.ino: In function ‘void setup()’:
Arduino_sensor_ultrasonico:44: error: expected unqualified-id before ‘.’ token
Arduino_sensor_ultrasonico.ino: In function ‘void loop()’:
Arduino_sensor_ultrasonico:72: error: expected unqualified-id before ‘.’ token
expected unqualified-id before ‘.’ token

This report would have more information with
“Show verbose output during compilation”
enabled in File > Preferences.

This is my program:

#include <LiquidCrystal.h>
// the pins connected to the Ultrasonic sensor
int echoPin = 9;
int trigPin = 10;
int lcdRSPin =12;
int lcdEPin =11;
int lcdD4Pin =5;
int lcdD5Pin =4;
int lcdD6Pin =3;
int lcdD7Pin =2;

LiquidCrystal lcd (lcdRSPin, lcdEPin, lcdD4Pin, lcdD5Pin, lcdD6Pin, lcdD7Pin);

void setup()
{
// set up serial
LiquidCrystal.begin (9600);
// set the pinmode on our ultrasonic echo, and tric pins
pinMode(echoPin, INPUT);
pinMode(trigPin, OUTPUT);
}

void loop()
{

float distanceCentimeters;
int pulseLenMicroseconds;

// bit-bang a small square wave
// on the trig pin to start the range
// finder
digitalWrite(trigPin, LOW);
delayMicroseconds(20);
digitalWrite(trigPin, HIGH);
delayMicroseconds(100);
digitalWrite(trigPin, LOW);

// measure the pulse length from the echo pin
pulseLenMicroseconds = pulseIn(echoPin, HIGH);

// calculate the distance using the speed of sound
distanceCentimeters = pulseLenMicroseconds / 29.387 / 2;

// print it out over serial
LiquidCrystal.println (distanceCentimeters);

delay(100);
}

Instead of doing something complicated with your FIRST programming attempt, why don't you try a simpler example, http://www.arduino.cc/en/Tutorial/LiquidCrystal

    LiquidCrystal.begin (9600);

The instance of the LiquidCrystal class, in your program, is NOT called LiquidCrystal. It is called lcd.

The LiquidCrystal class does not have a begin() method that takes a baud rate. The comment just above this line shows what you butchered. Put it back.

    LiquidCrystal.println (distanceCentimeters);

The instance of the LiquidCrystal class, in your program, is NOT called LiquidCrystal. It is called lcd.

Fixing these two lines makes the code compile.