A problem on my car project

Hello guys, i have a little problem on my project.

As you can see on the screen, I got some code problem if u can help I would be glad.

Well, do what the error message tells you to.

I see it but how can I declare it ?

As you can see on the screen

Actually I can't read that easily on my mobile.

Perhaps you could post the message as text?

#include <MotorShieldR3.h>
char command = ‘S’;
char precedenteCommand = ‘A’;
int velocity = 0;
int voiture ;

void setup() {
// put your setup code;: here, to run once:
Serial.begin(9600);

if(Serial.available()>0)
{
precedenteCommand = command ;
command = Serial.read() ;

}
}

void loop()
{

if(Serial.available() > 0)
{
precedenteCommand = command ;
command = Serial.read();

if(command!=precedenteCommand)
{
switch(command){
case ‘F’:
voiture.Forward_2W(255,255);
break;

case ‘B’:
voiture.Back_2W(0,0);
break;

case ‘R’
voiture.Left_2W();
break;

case ‘L’
voiture.Right_2W();
break;

case ‘G’
voiture.ForwardLeft_2W();
break;

case ‘I’
voiture.ForwardRight_2W();
break;

case ‘H’
voiture.BackLeft_2W();
break;

case ‘J’
voiture.BackRight_2W();
break;

case ‘S’
voiture.Stopped_2W();
break;
}
}
}
}

I just want to know how we tell that’s arduino is car in my project.

Please don’t post screenshots of text. That is very unhelpful. When you encounter an error you’ll see a button on the right side of the orange bar in the Arduino IDE “Copy error messages” (or the icon that looks like two pieces of paper at the top right corner of the black console window in the Arduino Web Editor). Click that button. In a message here, click the code tags button (</> on the forum toolbar) and then paste the error.

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Arduino : 1.8.7 (Mac OS X), Carte : "Arduino/Genuino Uno"

/Users/eleve/Desktop/arduino_beraud_ferrando/arduino_beraud_ferrando.ino: In function 'void loop()':
arduino_beraud_ferrando:39:19: error: request for member 'Forward_2W' in 'voiture', which is of non-class type 'const int'
           voiture.Forward_2W(255, 255);
                   ^
arduino_beraud_ferrando:43:19: error: request for member 'Back_2W' in 'voiture', which is of non-class type 'const int'
           voiture.Back_2W(0, 0);
                   ^
arduino_beraud_ferrando:47:13: error: expected ':' before 'voiture'
             voiture.Left_2W();
             ^
arduino_beraud_ferrando:47:21: error: request for member 'Left_2W' in 'voiture', which is of non-class type 'const int'
             voiture.Left_2W();
                     ^
arduino_beraud_ferrando:51:13: error: expected ':' before 'voiture'
             voiture.Right_2W();
             ^
arduino_beraud_ferrando:51:21: error: request for member 'Right_2W' in 'voiture', which is of non-class type 'const int'
             voiture.Right_2W();
                     ^
arduino_beraud_ferrando:55:13: error: expected ':' before 'voiture'
             voiture.ForwardLeft_2W();
             ^
arduino_beraud_ferrando:55:21: error: request for member 'ForwardLeft_2W' in 'voiture', which is of non-class type 'const int'
             voiture.ForwardLeft_2W();
                     ^
arduino_beraud_ferrando:59:13: error: expected ':' before 'voiture'
             voiture.ForwardRight_2W();
             ^
arduino_beraud_ferrando:59:21: error: request for member 'ForwardRight_2W' in 'voiture', which is of non-class type 'const int'
             voiture.ForwardRight_2W();
                     ^
arduino_beraud_ferrando:63:13: error: expected ':' before 'voiture'
             voiture.BackLeft_2W();
             ^
arduino_beraud_ferrando:63:21: error: request for member 'BackLeft_2W' in 'voiture', which is of non-class type 'const int'
             voiture.BackLeft_2W();
                     ^
arduino_beraud_ferrando:67:13: error: expected ':' before 'voiture'
             voiture.BackRight_2W();
             ^
arduino_beraud_ferrando:67:21: error: request for member 'BackRight_2W' in 'voiture', which is of non-class type 'const int'
             voiture.BackRight_2W();
                     ^
arduino_beraud_ferrando:71:13: error: expected ':' before 'voiture'
             voiture.Stopped_2W();
             ^
arduino_beraud_ferrando:71:21: error: request for member 'Stopped_2W' in 'voiture', which is of non-class type 'const int'
             voiture.Stopped_2W();
                     ^
exit status 1
request for member 'Forward_2W' in 'voiture', which is of non-class type 'const int'

Ce rapport pourrait être plus détaillé avec
l'option "Afficher les résultats détaillés de la compilation"
activée dans Fichier -> Préférences.