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- (* Chapter 8 - Program 4 *)
- program Find_All_Lower_Case_Characters;
-
- const String_Size = 30;
-
- type Low_Set = set of 'a'..'z';
-
- var Data_Set : Low_Set;
- Storage : string[String_Size];
- Index : 1..String_Size;
- Print_Group : string[26];
-
- begin (* main program *)
- Data_Set := [];
- Print_Group := '';
- Storage := 'This is a set test.';
-
- for Index := 1 to Length(Storage) do begin
- if Storage[Index] in ['a'..'z'] then begin
- if Storage[Index] in Data_Set then
- Writeln(Index:4,' ',Storage[Index],
- ' is already in the set')
- else begin
- Data_Set := Data_Set + [Storage[Index]];
- Print_Group := Print_Group + Storage[Index];
- Writeln(Index:4,' ',Storage[Index],
- ' added to group, complete group = ',
- Print_Group);
- end;
- end
- else
- Writeln(Index:4,' ',Storage[Index],
- ' is not a lower case letter');
- end;
- end. (* of main program *)