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This is a discussion on slug within the C++ Programming forums, part of the General Programming Boards category; Does anyone know what '#ifndef xxxx' is?...

  1. #1
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    Talking slug

    Does anyone know what '#ifndef xxxx' is?

  2. #2
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    well I know you need it when you create a header file because it defines the header if not already defined, but it is kinda like an if statement, and it is generally used to define something in the line after it with "#define xxxx"

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