🚀 go-pugleaf

"Josh Kirkpatrick" <jkirkpat@softhome.net> wrote in message
news:3f0b983a@newsgroups.borland.com...
> Hello, again.  My latest question should be very simple to answer.
>
> I need to programatically determine whether a string ("A", "b",etc.) is
> uppercase or lowercase.  What's the simplest course of action?
>
> TIA,
> ~Josh

When you say "string", I assume you mean "character", because to ask if a
string is upper/lower case is ambiguous, unless you are talking about
wanting to know if ALL characters in a string are upper/lower case.

Anyway, you can use isupper() and islower() to determine if an individual
character is upper/lower case.  If you want to know if an entire string is
upper/lower case, you will have to write your own functions, something like
this:

bool isStrUpper( const char *str )
{
  for ( int i=0; i<strlen(str); i++ )
  {
//    if ( !isalpha( str[i] ) ) return false;  // un-comment this line if
you don't want to ignore non-alphabetic characters
    if ( islower( str[i] ) ) return false;
  }
  return true;
}

bool isStrLower( const char *str )
{
  for ( int i=0; i<strlen(str); i++ )
  {
//    if ( !isalpha( str[i] ) ) return false;  // un-comment this line if
you don't want to ignore non-alphabetic characters
    if ( isupper( str[i] ) ) return false;
  }
  return true;
}

The implementation of these functions is not particularly efficient, but
they should get you started.

- Dennis