Scrolling text

void Menu::MoveText(int move)
{
    Serial.println("** MoveText **");
    char textToShow[10];

    if(move == GAUCHE)
        decalage --;
    else if(move == DROITE)
        decalage ++;

    boolean changed = false;
    Serial.println("** MoveText **");
    for(int index; index < 10; index++)
    {
        Serial.println("** MoveText: boucle for **");
        if(move == GAUCHE) // BCD -> ABC
        {
            if(curseurPos == 1) break;
            else
            {
                textToShow[index] = charInt[index-decalage];
                Serial.write("textToShow[index]: ");
                Serial.println(textToShow[index]);
                Serial.write("charInt[index-decalage]: ");
                Serial.println(charInt[index-decalage]);
                changed = true;
            }
        }
        else if(move == DROITE) // ABC -> BCD
        {
            Serial.println("** MoveText: move DROITE **");
            if(curseurPos == MAX_CHAR) break;
            else
            {
                textToShow[index] = charInt[index+decalage];
                Serial.write("textToShow[index]: ");
                Serial.println(textToShow[index]);
                Serial.write("charInt[index-decalage]: ");
                Serial.println(charInt[index-decalage]);
                changed = true;
            }
        }
        else break;
    }
    if(changed)
    {
        MenuScreen.ClearLine(2);
        MenuScreen.SendString(textToShow, 2);
    }
}