Arduino rc car

Hi, I've got a problem when i'm trying to upload my code to Arduino UNO .

This is my code:

//Se crea la variable
int unChar;

//Se crean las funciones
void adelante();
void reversa();
void parado();
void parado2();
void derecha();
void izquierda();

//Se iniclializa el puerto
void setup(){
  Serial.begin(9600);
}

//Se llama a la función dependiendo de los datos que reciba

void loop(){
  char unChar=Serial.read();//Se leen los datos entrantes
  
  //Se inicia el switch
  
  switch (unChar){
    
    case 'w':
    adelante();
    digitalWrite(led,HIGH); //Indicador para saber si recibe los datos
    Serial.write("Avanzar");
    break;
    
    case 's':
    reversa();
    digitalWrite(led,LOW); 
    Serial.write("retroceder");
    break;
    
    case '<':
    izquierda();
    digitalWrite(led,HIGH); 
    Serial.write("izquierda");
    break;
    
    case '>':
    reversa();
    digitalWrite(led,LOW); 
    Serial.write("derecha");
    break;
    
    case 'c':
    parado();
    digitalWrite(led,HIGH); 
    Serial.write("parado control");
    break;
   
   case 's':
    parado2();
    digitalWrite(led,LOW); 
    Serial.write("parado direccion");
    break;
  }
}
   
   //Declaración de funciones
   
   void adelante(){
     digitalWrite(motorA,LOW);
     digitalWrite(motorB,HIGH);
     //digitalWrite(led,HIGH);
   }
     
     void reversa(){
     digitalWrite(motorA,HIGH);
     digitalWrite(motorB,LOW);
     //digitalWrite(led,HIGH);
   }
     
     void izquierda(){
     digitalWrite(dirA,LOW);
     digitalWrite(dirB,HIGH);
     //digitalWrite(led,HIGH);
   }
   
   void derecha(){
     digitalWrite(dirA,HIGH);
     digitalWrite(dirB,LOW);
     //digitalWrite(led,HIGH);
   }
    
    void parado(){
     digitalWrite(motorA,LOW);
     digitalWrite(motorB,LOW);
     //digitalWrite(led,HIGH);
   }
   
   void parado2(){
     digitalWrite(dirA,LOW);
     digitalWrite(dirB,LOW);
     //digitalWrite(led,HIGH);
   }

And these are the problems :

arduino.png

define the undefined...:
like..:

int led=13; //??
byte motorA=4;
byte motorB=5;
byte dirA=.... //compete with correct pin numbers

I don't know how to do that , please can you help me? . The connections of the car are something like that.

Hi, I've got a problem when i'm trying to upload my code to Arduino UNO

Did you write the code or copy some/all of it from somewhere ?

How many of the Arduino example programs in the IDE have you looked at and run ?

Ok , I just read some information about it and I solved my problem :smiley: :smiley: . Thanks. Sorry for not seeking information before. :-[ :-[