compiler warning still won't go away

[trprince]

i am using the ctype.h header file too

void encrypt(char secret[],char message[],char coded[]){    
  int count; 
  char letter;     
  for(count = 0;count < MAXLEN;count++){     
    letter = message[count];   
    if(isalpha(letter)){
      letter = tolower(letter);  
      letter = secret[letter - 'a']; 
      coded[count] = letter; 
    }    
  }  
}

[Aia]

And what would that warning be?
As far I can see there's not reason for your compiler to complain.
Post the warning.