Splitting a string in arduino for scrolling LCD screen

Question

Hi I'm trying to figure out how to split the following LCD display code for a scrolling LED effect. but when I try to use the Substring function I get the error "class string has no member named Substring"

void setup()
{
    lcd.init(); 
    }
void loop()
{
for(int i = 0; i < 20; i++) { 
  lcd.clear ();
lcd.backlight();
    lcd.setCursor(i, 1);
    String printy = "Hello World         ";
    String printy1 = printy.SubSting(0, 20-i);
    String printy2 = printy.SubSting(20-i, 20);
    lcd.print(printy1);
delay(500);
}
}

Answer 1

抱歉，如果我正确拼写字符串并输入“ substring”而不是“ substing”，这会有所帮助。