Enter command: xyz Unrecognized command! Enter command: ai Tom Jones 123 Person Jones added Enter command: ai Bill Jones 000 There is already a person with this last name! Enter command: pi Bob No person with that name! Enter command: ar 1001 Room 1001 added Enter command: ar 1001 There is already a room with this number! Enter command: ar x1001 Could not read an integer value! Enter command: ar -1001 Room number is not in range! Enter command: am 1001 10 Silly_Stuff Meeting added at 10 Enter command: am 1001 10 Important_Stuff There is already a meeting at that time! Enter command: am 1001 x10 Important_Stuff Could not read an integer value! Enter command: am 1001 6 Important_Stuff Time is not in range! Enter command: ap 1001 10 Bob No person with that name! Enter command: dp 1001 10 Bob No person with that name! Enter command: ap 1001 10 Jones Participant Jones added Enter command: ap 1001 10 Jones This person is already a participant! Enter command: dp 1001 10 Jones Participant Jones deleted Enter command: dp 1001 10 Jones This person is not a participant in the meeting! Enter command: ap 1001 10 Jones Participant Jones added Enter command: pm 1001 3 No meeting at that time! Enter command: pm 1002 10 No room with that number! Enter command: pr 23 No room with that number! Enter command: ps Information for 1 rooms: --- Room 1001 --- Meeting time: 10, Topic: Silly_Stuff Participants: Tom Jones 123 Enter command: dg Cannot clear people list unless there are no meetings! Enter command: di Jones This person is a participant in a meeting! Enter command: pgpspa Information for 1 people: Tom Jones 123 Enter command: Information for 1 rooms: --- Room 1001 --- Meeting time: 10, Topic: Silly_Stuff Participants: Tom Jones 123 Enter command: Memory allocations: Persons: 1 Meetings: 1 Rooms: 1 Enter command: ld nonexistent_file.txt Could not open file! Enter command: pgpspa Information for 1 people: Tom Jones 123 Enter command: Information for 1 rooms: --- Room 1001 --- Meeting time: 10, Topic: Silly_Stuff Participants: Tom Jones 123 Enter command: Memory allocations: Persons: 1 Meetings: 1 Rooms: 1 Enter command: ld normal_save1.txt Data loaded Enter command: ai William Wordsworth 555 Person Wordsworth added Enter command: pgpspa Information for 4 people: Elton John 789 Tom Jones 123 Silas Marner 456 William Wordsworth 555 Enter command: Information for 2 rooms: --- Room 1001 --- Meeting time: 10, Topic: Music Participants: Elton John 789 Tom Jones 123 Meeting time: 2, Topic: Literature Participants: None --- Room 1002 --- No meetings are scheduled Enter command: Memory allocations: Persons: 4 Meetings: 2 Rooms: 2 Enter command: ld invalid_file.txt Invalid data found in file! Enter command: pgpspa Information for 4 people: Elton John 789 Tom Jones 123 Silas Marner 456 William Wordsworth 555 Enter command: Information for 2 rooms: --- Room 1001 --- Meeting time: 10, Topic: Music Participants: Elton John 789 Tom Jones 123 Meeting time: 2, Topic: Literature Participants: None --- Room 1002 --- No meetings are scheduled Enter command: Memory allocations: Persons: 4 Meetings: 2 Rooms: 2 Enter command: qq All rooms and meetings deleted All persons deleted Done