.c Vs .cc Vs. .cpp Vs .hpp Vs .h Vs .cxx
Answer : Historically, the first extensions used for C++ were .c and .h , exactly like for C. This caused practical problems, especially the .c which didn't allow build systems to easily differentiate C++ and C files. Unix, on which C++ has been developed, has case sensitive file systems. So some used .C for C++ files. Other used .c++ , .cc and .cxx . .C and .c++ have the problem that they aren't available on other file systems and their use quickly dropped. DOS and Windows C++ compilers tended to use .cpp , and some of them make the choice difficult, if not impossible, to configure. Portability consideration made that choice the most common, even outside MS-Windows. Headers have used the corresponding .H , .h++ , .hh , .hxx and .hpp . But unlike the main files, .h remains to this day a popular choice for C++ even with the disadvantage that it doesn't allow to know if the header can be included in C context or not. Standard headers now have no extension ...