The National Institute for Computational Sciences


General: Why do I get the error: "/usr/include/c++/4.1.2/backward/backward_warning.h:32:2"?

#include is the Standard C++ way to include header files. The 'iostream' is an identifier that maps to the file iostream.h. In older C++ versions you had to specify the file name of the header file, hence #include . Older compilers may not recognize the modern method but newer compilers will accept both methods even though the old method is obsolete.


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