CamelCase in Pascal

Example for versions Free Pascal 2.2.0, Turbo Pascal 4.0, Turbo Pascal 5.0, Turbo Pascal 5.5, Turbo Pascal 6.0, gpc 20070904

This example is similar to previous one, but uses sets of characters for letter check. This makes the code more readable.

Note that in Turbo Pascal series this program works only with Turbo Pascal 4.0 and higher due to the fact that earlier versions didn’t have char datatype. 

program Camelcase;

var
    text, cc: string[100];
    c: char;
    i: integer;
    lastSpace: boolean;
    upper, lower: set of char;

begin
    upper := ['A'..'Z'];
    lower := ['a'..'z'];
    readln(text);
    lastSpace := true;
    cc := '';
    for i := 1 to Length(text) do
    begin
        c := text[i];
        if (c in lower) or (c in upper) then
        begin
            if (lastSpace) then { convert to uppercase }
            begin
                if (c in lower) then
                    c := chr(ord(c) - 32);
            end
            else { convert to lowercase }
                if (c in upper) then
                    c := chr(ord(c) + 32);
            cc := cc + c;
            lastSpace := false;
        end
        else
            lastSpace := true;
    end;
    writeln(cc);
end.