This program illustrates several STL function objects.
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The product of 25 and 6 is 150.
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The product of 12 and 8 is 96.
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The product of 3.14 and 2.71 is 8.5094.
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The expression ("Hello" < "Good-bye") is false.
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Here are the contents of an integer vector:
1 2 3 4 5
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Now we negate all the values and re-display to confirm:
-1 -2 -3 -4 -5
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