This program illustrates the use of the STL transform algorithm (default
version) to find the square root of each value in a range of integers,
as well as the cube of each value in a range of integers.

The square roots are found with a built-in library function and placed in
a different container from the original values. The cubes are found with a
programmer-defined function and they overwrite the original values.
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Here are the values in a vector:
1 2 3 4 5 6 7 8 9 10
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Here are the values in a deque:
-1 -2 -3 -4 -5 -6 -7 -8 -9 -10
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Here are the new values in the deque after all but the values at the ends
have been overwritten by the square roots of the corresponding values from
the vector:
-1 1.41421 1.73205 2 2.23607 2.44949 2.64575 2.82843 3 -10
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And the iterator returned by the algorithm is pointing at the deque value -10.
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Here are the cubes of the original values, read now from the original vector:
1 8 27 64 125 216 343 512 729 1000
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This time the iterator returned by the algorithm is pointing to the end of
the original vector.
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