This program illustrates the use of the STL fill_n() algorithm
to set a given number values starting at a given location in a
vector of integers to a given value.
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Here are the contents of v:
1 2 3 4 5 6 7 8 9 10
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Now we set 5 values of v, starting at the 3rd, to 50.
Here are the revised contents of v:
1 2 50 50 50 50 50 8 9 10
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Now we set the last three values of v to -1.
Here are the revised contents of v:
1 2 50 50 50 50 50 -1 -1 -1
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Finally, we initialize the entire vector to 100.
Here are the revised contents of v:
100 100 100 100 100 100 100 100 100 100
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