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Should I include lt;xxxx. h gt; or lt;cxxxx gt; in C++ programs? -1 re "we are not polluting the global namespace", you have just quoted and discussed that this is not the case so a bit of self-contradiction it is important because it directly affects the conclusion of what is best practice your conclusion above is wrong it is weird you first discuss why it's a bad choice (possibility of code not working across compilers, unintended namespace
Why are #ifndef and #define used in C++ header files? The cost of opening a file, discarding all its contents, and closing it over and over might not sound like much, but for a large header included transitively by hundreds of other headers (e g windows h, the low-level stuff providing simple type definitions like stdint h, types h, etc ), the difference between opening it exactly once per source file and opening it a hundred times (where only
Creating your own header file in C - Stack Overflow You want to place #ifndef #defines around your h code so that if you include the same h twice in different parts of your programs, the prototypes are only included once client h #ifndef CLIENT_H #define CLIENT_H short socketConnect(char *host,unsigned short port,char *sendbuf,char *recievebuf, long rbufsize); #endif ** CLIENT_H *
*. h or *. hpp for your C++ headers class definitions another convention is to use h for C headers and hpp for C++; a good example would be the boost library Quote from Boost FAQ, File extensions communicate the "type" of the file, both to humans and to computer programs The ' h' extension is used for C header files, and therefore communicates the wrong thing about C++ header files
c - What mean file with extension h. in? - Stack Overflow Typically, a h in file is a header template that is filled in to become the actual header by a configure script based on the outcome of several tests for features present on the target platform Share