This program illustrates the use of the STL rotate() algorithm to rotate
the order of all, or just some, of the values in a vector of integers.
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Here are the contents of the vector:
1 2 3 4 5 6 7 8 9 10
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Now we rotate the order of all values in the vector
in so that the fourth value becomes the first value.
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Here are the revised contents of the vector:
4 5 6 7 8 9 10 1 2 3
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Next we rotate the order of the 2nd to the 6th values in the vector so that
the third value in that group of values becomes the first value of the group.
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Here are the revised contents of the vector:
4 7 8 9 5 6 10 1 2 3
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