Compile error with no message

Using Arduino Programming Questions
1

I have written the following

// read serial and repeat to serial with added string


void setup()
{
  Serial.begin(115200);
}

void loop()
{
 string message[30];
 string saluation[7];
 string fullString[40];
 int lf = 10;
 if (Serial.available() > 0)
  {
    Serial.readBytesUntil(lf, message, 30);
    saluation = 'I got ';
    fullString = saluation + message;
    Serial.println(fullString);
    delay(1000);
  }
}

When I try to compile, the orange bar says "error compiling", and there is no explanation below.
I know the way I'm doing this is kludgie, but I'm still new to C or C+.
Jim

2

There's a number of errors. First, there is no string data type. C++ supports the String data type, so case does make a difference. Second, readBytesUntil() expects the first argument to be a char, not an int. You could cast it, but why? Also, you are using more data than you really need.

Is this what you are trying to do:

void setup()
{
  Serial.begin(115200);
}

void loop()
{
 char message[30];
 int lf = 10;
 int bytesRead;
 
 if (Serial.available() > 0)
  {
    bytesRead = Serial.readBytesUntil('\n', message, 30);
    message[bytesRead] = '\0';             // Add null termination character
    Serial.print("I got ");
    Serial.println(message);
    delay(1000);
  }
}
3

Thanks econjack, that did the trick!
Jim