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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 *)
-
-
-
-
- { Result of execution
-
- 1 T is not a lower case letter
- 2 h added to group, complete group = h
- 3 i added to group, complete group = hi
- 4 s added to group, complete group = his
- 5 is not a lower case letter
- 6 i is already in the set
- 7 s is already in the set
- 8 is not a lower case letter
- 9 a added to group, complete group = hisa
- 10 is not a lower case letter
- 11 s is already in the set
- 12 e added to group, complete group = hisae
- 13 t added to group, complete group = hiseat
- 14 is not a lower case letter
- 15 t is already in the set
- 16 e is already in the set
- 17 s is already in the set
- 18 t is already in the set
- 19 . is not a lower case letter
-
- }