expected unqualified-id before numeric constant error and I don't understand why

Using Arduino Programming Questions
#1

Hello!
I’m trying to make my program translate a string into a morse code and display it with the LED flashing. But whenever I try to play my code it gives me errors that I do not understand. Here’s the full code (sorry for it being messy xD):

int WhtLed1 = 13;
void setup()
{
  
  pinMode(WhtLed1, OUTPUT);
  
  // Nustatom šviesos diodus į LOW.
  digitalWrite(WhtLed1, LOW);

  //Nustatom morzes abecele
int charlist[] = {65, 66};
int 65[] = {1000, 3000};
int 66[] = {3000, 1000, 1000, 1000}
int wlet = -1;
int k = -1;
}
void loop()
{ 
char text = "AA"
text.toCharArray(letters[],length(text));
for (i = 0;i < length(text);i + 1) {
  int tcs = char letter[wlet+1]
  for (j = 0;j< charlist[currentcharlist];j + 1) {
    if (tcs == charlist[k+1]) {
      for (l = 0; l < sifeof(tcs[]); l + 1) {
        digitalWrite(WhtLed1, HIGH);
        int h = 0;
        delay(tsc[h+1]);
        digitalWrite(WhtLed1, LOW);
        delay(1000);
        
      }
      
    }
  }
  }
}

And here’s the error:

Arduino: 1.8.0 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Users\Tech_Mokinys6\Desktop\Kristijono morzes kodo vertejas\morzes_kodo_vertejas\morzes_kodo_vertejas.ino: In function 'void setup()':

morzes_kodo_vertejas:12: error: expected unqualified-id before numeric constant

 int 65[] = {1000, 3000};

     ^

morzes_kodo_vertejas:13: error: expected unqualified-id before numeric constant

 int 66[] = {3000, 1000, 1000, 1000};

     ^

C:\Users\Tech_Mokinys6\Desktop\Kristijono morzes kodo vertejas\morzes_kodo_vertejas\morzes_kodo_vertejas.ino: In function 'void loop()':

C:\Users\Tech_Mokinys6\Desktop\Kristijono morzes kodo vertejas\morzes_kodo_vertejas\morzes_kodo_vertejas.ino:19:13: warning: invalid conversion from 'const char*' to 'char' [-fpermissive]

 char text = "AA"

             ^

morzes_kodo_vertejas:20: error: expected ',' or ';' before 'text'

 text.toCharArray(letters[],length(text));

 ^

morzes_kodo_vertejas:21: error: 'i' was not declared in this scope

 for (i = 0;i < length(text);i + 1) {

      ^

morzes_kodo_vertejas:21: error: 'length' was not declared in this scope

 for (i = 0;i < length(text);i + 1) {

                           ^

morzes_kodo_vertejas:22: error: expected primary-expression before 'char'

   int tcs = char letter[wlet+1]

             ^

morzes_kodo_vertejas:23: error: 'j' was not declared in this scope

   for (j = 0;j< charlist[currentcharlist];j + 1) {

              ^

morzes_kodo_vertejas:23: error: 'charlist' was not declared in this scope

   for (j = 0;j< charlist[currentcharlist];j + 1) {

                 ^

morzes_kodo_vertejas:23: error: 'currentcharlist' was not declared in this scope

   for (j = 0;j< charlist[currentcharlist];j + 1) {

                          ^

exit status 1
expected unqualified-id before numeric constant

Thanks! :3

#2 
int 65[] = {1000, 3000};

Variable names can not start with a number, and certainly can not consist of nothing but numbers.

#3

A variable name CANNOT start with a number. Think about it, how would the compiler ever be able to tell if you were talking about the number 65 or the array 65?

#4

Hmm.. Then do you have any idea how should I make the code work? This was the only way I figured. Unless I can make the arrays called by their letters and then take the array name and access it as a letter....

#5

The morse code thing has been done so many times and so many ways. I’m certainly not going to rehash it all here. Go have a look at some of the examples around.

#6

As the other guys pointed out array name cant start with a number.

I did a morse code a while ago so if you need ideas check it out.

https://github.com/Krsma/Morse-code-manual

#7

Thanks for this one.

I got the same error when I used

int PIND2; instead of pinD2;

1 Like
#8