This program illustrates the use of a "back_inserter", which can be used
if the recipient container supports the push_back() member function.
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First we display five integers from a vector:
1 2 3 4 5
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Then we copy the five integers from that vector into an empty deque,
using a "back_inserter", and then display the deque to confirm:
1 2 3 4 5
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Finally, we copy the same five integers from the vector into an empty list,
again using a "back_inserter", and again displaying the list to confirm:
1 2 3 4 5
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