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, 4, 6, 8 }
Map H = { 111, 333, 666, 888 }
Map I = { 111, 333, 666, 888 }
Map J = { 111, 333, 666, 888 }

Testing GetValue() function: 

In Map E, Value for Key = 1 is (null)
In Map G, Value for Key = 1 is (null)
In Map H, Value for Key = 111 is Alan
In Map J, Value for Key = 666 is Horticulture

Testing Equality: 

E IS equal to E
E IS equal to F
H IS equal to I
I IS equal to H

E is NOT equal to G
G is NOT equal to I
I is NOT equal to J

Testing Copy Constructor: 

Map K (Copy of E) = Empty
Map L (Copy of H) = { 111, 333, 666, 888 }
Map M (Copy of J) = { 111, 333, 666, 888 }

Testing Assignment: 

After assigning J to K, Map K = { 111, 333, 666, 888 }
After assigning M to L, Map L = { 111, 333, 666, 888 }
After assigning H to M, Map M = { 111, 333, 666, 888 }

End of Program