Question

I am using a code that looks like:

const int NUMBER_OF_FIELDS = 3;
int fieldIndex = 0;
int values[NUMBER_OF_FIELDS];

void setup()
  {
  Serial.begin(9600);
  }

void loop()
  {
   if(Serial.available())
    {
     char ch = Serial.read();
     if(ch>='0' && ch <= '9')
       {
       values[fieldIndex] = (values[fieldIndex]*10 +(ch-'0'));
       }
      else if (ch == ',')
       {
        if(fieldIndex < NUMBER_OF_FIELDS -1)
        fieldIndex++;
       }
      else 
       {
       Serial.print(fieldIndex+1);
       Serial.println("fields recieved:");
       for (int i = 0; i<=fieldIndex; i++);
         {
         //Serial.println(values[i]);
         //values[i]= 0;
         }
        fieldIndex = 0; 
       } 
    } 
  }

But I am getting an error that says :

name lookup for ‘i’ changed for new ISO ‘for’ scoping

I don’t think I did anything wrong in the for loop, so why am I getting this error ?

Answer 1

You have a semicolon after the for so the int i which has the for loop scoping only is not valid outside of the for loop.

You probably meant to do the following.

  for (int i = 0; i<=fieldIndex; i++)     // no semicolon
  {
     Serial.println(values[i]);
     values[i]= 0;
  }