int stringlength( char* const str )
{
  short int len; 
  char *s;
  len = 0; 
  s = str; 
  while ( (*s) != '\0' ) {
    s++;
    len++;
  }
  return len;
}
int main()
{
  short int n; 
  n = stringlength( "My Name is David\n" ); 
  return 0;
}