error when i using a function in a class in cpp

[mhdizgah]

Posted on October 01, 2014 at 22:37

hi every body

in a cpp file i include a header file and want to use header file's functions inside class but it shows a error:    lib1.h    class class_x{    public:    calss_x();    private:    }---    lib1.cpp    &sharpinclude ''lib1.h''    &sharpinclude ''header1.h''    class_x::class_X()    {    function_of_header1.h();    }error shows undefine symbol function_of_header1.h()whas matter?WBR #cpp #class

[chen]

Posted on October 02, 2014 at 10:46

Hi

''error shows undefine symbol function_of_header1.h() whas matter?'' Have you applied the ''extern c'' to the header?

http://stackoverflow.com/questions/1041866/in-c-source-what-is-the-effect-of-extern-c

The same thing needs to be done for C++ code to access C code.