This program illustrates the clear() and erase() member functions
of the map interface.
Press Enter to continue ...

We begin with a map containing the following pairs:
A 65
B 66
C 67
D 68
E 69
F 70
G 71
H 72
I 73
J 74
Press Enter to continue ...

Then we delete any pairs having a key of F.
Press Enter to continue ...

The number of deletions was 1.
And here are the remaining contents of the map:
A 65
B 66
C 67
D 68
E 69
G 71
H 72
I 73
J 74
Press Enter to continue ...

Next we delete any pairs having a key of T.
Press Enter to continue ...

The number of deletions was 0.
And here are the remaining contents of the map:
A 65
B 66
C 67
D 68
E 69
G 71
H 72
I 73
J 74
Press Enter to continue ...

Now we delete the first pair of the map, using an iterator for access.
Press Enter to continue ...

The remaining contents of the map are now these:
B 66
C 67
D 68
E 69
G 71
H 72
I 73
J 74
Press Enter to continue ...

For our final deletion before clearing all the remaining pairs, we delete those
pairs having keys in the range from capital letter D to capital letter G.
Press Enter to continue ...

After deleting this range of values, the remaining pairs in the map are:
B 66
C 67
H 72
I 73
J 74
Press Enter to continue ...

Finally, we clear all remaining values from the map.
Press Enter to continue ...

The map is now empty.
Press Enter to continue ...