| Naming
Program Elements |
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| • | Identifiers
are used in C++ to name things – |
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| identifiers
are made up of letters, digits, and the |
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| underscore
character (_), and must begin with a |
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| letter
or an underscore. |
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| • | Valid
identifiers Invalid identifiers |
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| sum_of_squares 40hours |
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| J9 Get
Data |
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| box_22A box-22 |
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| GetData cost_in_$ |
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| Bin3D4 int |
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| count |
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