Constructing some sets: 

Set A = Empty
Set B = { 1 }
Set C = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }
Set D = { 2, 4, 6, 8, 10 }

Constructing some maps: 

Map E = Empty
Map F = Empty
Map G = { (2, Alan), (4, Betty), (6, Cal), (8, Dotty) } 
Map H = { (111, Alan), (333, Cal), (666, Dotty), (888, Betty) } 
Map I = { (111, Alan), (333, Cal), (666, Dotty), (888, Betty) } 
Map J = { (111, Elm), (333, Gregorian), (666, Horticulture), (888, Fignewton) } 

Displaying the same sets and  maps using base class pointers: 

Empty
{ 1 }
{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }
{ 2, 4, 6, 8, 10 }
Empty
Empty
{ (2, Alan), (4, Betty), (6, Cal), (8, Dotty) } 
{ (111, Alan), (333, Cal), (666, Dotty), (888, Betty) } 
{ (111, Alan), (333, Cal), (666, Dotty), (888, Betty) } 
{ (111, Elm), (333, Gregorian), (666, Horticulture), (888, Fignewton) } 
Destructor for Map
Destructor for Set
Destructor for Map
Destructor for Set
Destructor for Map
Destructor for Set
Destructor for Map
Destructor for Set
Destructor for Map
Destructor for Set
Destructor for Map
Destructor for Set
Destructor for Set
Destructor for Set
Destructor for Set
Destructor for Set