Problem with code

I am working on a car robot,and I have a code that worked until now, I am using another computer and the updated IDE.
Here is the code:

long distancia;
long tiempo;
#include <Servo.h>

// Arduino pins for the shift register
#define MOTORLATCH 12
#define MOTORCLK 4
#define MOTORDATA 8

// 8-bit bus after the 74HC595 shift register 
// (not Arduino pins)
// These are used to set the direction of the bridge driver.
#define MOTOR1_A 2
#define MOTOR1_B 3
#define MOTOR2_A 1
#define MOTOR2_B 4
#define MOTOR3_A 5
#define MOTOR3_B 7
#define MOTOR4_A 0
#define MOTOR4_B 6

// Arduino pins for the PWM signals.
#define MOTOR1_PWM 11
#define MOTOR2_PWM 3
#define MOTOR3_PWM 6
#define MOTOR4_PWM 5
//#define SERVO1_PWM 10
//#define SERVO2_PWM 9

// Codes for the motor function.
#define ADELANTE 1
#define ATRAS 2
#define DERECHA 1
#define IZQUIERDA 2
#define FRENAR 3
#define LIBRE 4

// Declare classes for Servo connectors of the MotorShield.
//Servo servo_1;
//Servo servo_2;

void setup() {
  // put your setup code here, to run once:
  pinMode(A0, OUTPUT); /*activación del pin 9 como salida: para el pulso ultrasónico*/
  pinMode(10, INPUT); /*activación del pin 8 como entrada: tiempo del rebote del ultrasonido*/
  pinMode(2, OUTPUT);

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(A0,LOW); /* Por cuestión de estabilización del sensor*/
  digitalWrite(A0, HIGH); /* envío del pulso ultrasónico*/
  tiempo=pulseIn(10, HIGH); /* Función para medir la longitud del pulso entrante. Mide el tiempo que transcurrido entre el envío
  del pulso ultrasónico y cuando el sensor recibe el rebote, es decir: desde que el pin 12 empieza a recibir el rebote, HIGH, hasta que
  deja de hacerlo, LOW, la longitud del pulso entrante*/
  distancia= int(0.017*tiempo); /*fórmula para calcular la distancia obteniendo un valor entero*/
  /*Monitorización en centímetros por el monitor serial*/
  Serial.println("Distancia ");
  Serial.println(" cm");

// Initializing
// ------------
// There is no initialization function.
// The shiftWrite() has an automatic initializing.
// The PWM outputs are floating during startup, 
// that's okay for the Motor Shield, it stays off.
// Using analogWrite() without pinMode() is valid.

// ---------------------------------
// motor
// Select the motor (1-4), the command, 
// and the speed (0-255).
void motor(int nMotor, int command, int speed)
  int motorA, motorB;

  if (nMotor >= 1 && nMotor <= 4)
    switch (nMotor)
    case 1:
      motorA   = MOTOR1_A;
      motorB   = MOTOR1_B;
    case 2:
      motorA   = MOTOR2_A;
      motorB   = MOTOR2_B;
    case 3:
      motorA   = MOTOR3_A;
      motorB   = MOTOR3_B;
    case 4:
      motorA   = MOTOR4_A;
      motorB   = MOTOR4_B;

    switch (command)
    case ADELANTE:
      motor_output (motorA, HIGH, speed);
      motor_output (motorB, LOW, -1);     // -1: no PWM set
    case ATRAS:
      motor_output (motorA, LOW, speed);
      motor_output (motorB, HIGH, -1);    // -1: no PWM set
    case FRENAR:
      // The AdaFruit library didn't implement a brake.
      // The L293D motor driver ic doesn't have a good
      // brake anyway.
      // It uses transistors inside, and not mosfets.
      // Some use a software break, by using a short
      // reverse voltage.
      // This brake will try to brake, by enabling 
      // the output and by pulling both outputs to ground.
      // But it isn't a good break.
      motor_output (motorA, LOW, 255); // 255: fully on.
      motor_output (motorB, LOW, -1);  // -1: no PWM set
    case LIBRE:
      motor_output (motorA, LOW, 0);  // 0: output floating.
      motor_output (motorB, LOW, -1); // -1: no PWM set

// ---------------------------------
// motor_output
// The function motor_ouput uses the motor driver to
// drive normal outputs like lights, relays, solenoids, 
// DC motors (but not in reverse).
// It is also used as an internal helper function 
// for the motor() function.
// The high_low variable should be set 'HIGH' 
// to drive lights, etc.
// It can be set 'LOW', to switch it off, 
// but also a 'speed' of 0 will switch it off.
// The 'speed' sets the PWM for 0...255, and is for 
// both pins of the motor output.
//   For example, if motor 3 side 'A' is used to for a
//   dimmed light at 50% (speed is 128), also the 
//   motor 3 side 'B' output will be dimmed for 50%.
// Set to 0 for completelty off (high impedance).
// Set to 255 for fully on.
// Special settings for the PWM speed:
//    Set to -1 for not setting the PWM at all.
void motor_output (int output, int high_low, int speed)
  int motorPWM;

  switch (output)
  case MOTOR1_A:
  case MOTOR1_B:
    motorPWM = MOTOR1_PWM;
  case MOTOR2_A:
  case MOTOR2_B:
    motorPWM = MOTOR2_PWM;
  case MOTOR3_A:
  case MOTOR3_B:
    motorPWM = MOTOR3_PWM;
  case MOTOR4_A:
  case MOTOR4_B:
    motorPWM = MOTOR4_PWM;
    // Use speed as error flag, -3333 = invalid output.
    speed = -3333;

  if (speed != -3333)
    // Set the direction with the shift register 
    // on the MotorShield, even if the speed = -1.
    // In that case the direction will be set, but
    // not the PWM.
    shiftWrite(output, high_low);

    // set PWM only if it is valid
    if (speed >= 0 && speed <= 255)    
      analogWrite(motorPWM, speed);

// ---------------------------------
// shiftWrite
// The parameters are just like digitalWrite().
// The output is the pin 0...7 (the pin behind 
// the shift register).
// The second parameter is HIGH or LOW.
// There is no initialization function.
// Initialization is automatically done at the first
// time it is used.

void shiftWrite(int output, int high_low)
  static int latch_copy;
  static int shift_register_initialized = false;

  // Do the initialization on the fly, 
  // at the first time it is used.
  if (!shift_register_initialized)
    // Set pins for shift register to output
    pinMode(MOTORCLK, OUTPUT);

    // Set pins for shift register to default value (low);
    digitalWrite(MOTORDATA, LOW);
    digitalWrite(MOTORLATCH, LOW);
    digitalWrite(MOTORCLK, LOW);
    // Enable the shift register, set Enable pin Low.
    digitalWrite(MOTORENABLE, LOW);

    // start with all outputs (of the shift register) low
    latch_copy = 0;

    shift_register_initialized = true;

  // The defines HIGH and LOW are 1 and 0.
  // So this is valid.
  bitWrite(latch_copy, output, high_low);

  // Use the default Arduino 'shiftOut()' function to
  // shift the bits with the MOTORCLK as clock pulse.
  // The 74HC595 shiftregister wants the MSB first.
  // After that, generate a latch pulse with MOTORLATCH.
  shiftOut(MOTORDATA, MOTORCLK, MSBFIRST, latch_copy);
  delayMicroseconds(5);    // For safety, not really needed.
  digitalWrite(MOTORLATCH, HIGH);
  delayMicroseconds(5);    // For safety, not really needed.
  digitalWrite(MOTORLATCH, LOW);

And here is the error:

TestDireccion.ino: In function 'void setup()':
TestDireccion.ino:140:6: error: redefinition of 'void setup()'
Velocidad.ino:141:6: error: 'void setup()' previously defined here
TestDireccion.ino: In function 'void loop()':
TestDireccion.ino:147:6: error: redefinition of 'void loop()'
Velocidad.ino:149:6: error: 'void loop()' previously defined here
TestDireccion.ino: In function 'void motor(int, int, int)':
TestDireccion.ino:188:6: error: redefinition of 'void motor(int, int, int)'
Velocidad.ino:183:6: error: 'void motor(int, int, int)' previously defined here
TestDireccion.ino: In function 'void motor_output(int, int, int)':
TestDireccion.ino:275:6: error: redefinition of 'void motor_output(int, int, int)'
Velocidad.ino:270:6: error: 'void motor_output(int, int, int)' previously defined here
TestDireccion.ino: In function 'void shiftWrite(int, int)':
TestDireccion.ino:334:6: error: redefinition of 'void shiftWrite(int, int)'
Velocidad.ino:329:6: error: 'void shiftWrite(int, int)' previously defined here
Error de compilación

I hope you can help me!
Sorry for my english :smiley:

long distancia;
long tiempo;
#include <Servo.h>

You can’t have any code before the # statements

It compiles OK for me.

Have you by any chance got 2 tabs with code in both in the IDE ?

Thanks! Effectively, I had 2 tabs in the IDE. I closed all, I opened only the first program and it worked! Thanks again!