C and C + + call each other

Objective

Nothing to say, directly on the code, a picture to win thousands of words, and here I believe a code wins thousands of words, the code will continue to update, of course, I am aware of the code in the absence of any, or loopholes, the code is compiled on the ArchLinux, as for other platforms, did not bother to verify.

C-Tune C++>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>$ Cat a.cpp#--------------------------------------------------------------------    ------------------#include #include class student{public:std::string name;    Public:int age;    Public:void show_age (void) {std::cout << name << "' s Age was:" << age << Std::endl; }};extern "C" void f (int); void f (int i) {std::cout << "in f function I value is:" << i <<std::endl;}    extern "C" void *create_student (void), void *create_student (void) {student *xiaoming = NULL;    xiaoming = new Student ();    Xiaoming->student::name = "Xiao Ming";    Xiaoming->student::age = 24; Std::cout << "Create successful" << Std::endl; return xiaoming;} extern "C" void show_student (void *std), void show_student (void *std) {(student*) STD)->student::show_age (); # ======================================================================================$ Cat b.c#--------------- -----------------------------------------------------------------------#include extern void f (int); extern void *    Create_student (void); extern void Show_student (void*); int main (int argv, char **argc) {void *std;    std = create_student (); show_student (STD); return 0;} # ======================================================================================$ Cat Makefile#---------- ----------------------------------------------------------------------------cc=gcccpp=g++makedepend=gcc-mm- Mtdefinc =ldflags + =-lstdc++csrcs + B.ccppsrcs + = A.CPPCOBJS = $ (CSRCS:.C=.O) Cppobjs = $ (CPPSRCS:.CPP=.O) # CDEF = $ (CSRC S:.C=.D) # Cppdef = $ (CPPSRCS:.CPP=.D) Tar_name=testdef_runtag + = Show_all_paramdef_ruNTAG + = $ (tar_name) All: $ (def_runtag) $ (COBJS):%.o:%.c$ (CC)-C $<-O [email protected]$ (CPPOBJS):%.o:%.cpp$ ( CPP)-C $<-O [email protected]# $ (CDEF):%.d:%.c# $ (makedepend) $ (&LT;:.C=.O) $< $ (definc) > [EMAIL&NBSP;PR otected]# $ (cppdef):%.d:%.cpp# $ (makedepend) $ (&LT;:.CPP=.O) $< $ (definc) > [email protected]$ (TAR_NAME): $ (COBJS) $ (CPPOBJS) $ (CC)-O $ (tar_name) $ (COBJS) $ (CPPOBJS) $ (ldflags) [email protected]-rf $ (COBJS) [email  Protected]-RF $ (CPPOBJS) [email protected]-rf $ (cdef) [email protected]-rf $ (cppdef) Show_all_param: @echo $ (CC) @echo $ (CPP) @echo $ (CSRCS) @echo $ (CPPSRCS) @echo $ (COBJS) @echo $ (CPPOBJS) @echo $ (cdef) @echo $ (cppdef) @echo $ (def_ Runtag) clean:[email protected]-rf $ (COBJS) [email protected]-rf $ (CPPOBJS) [email protected]-rf $ ( CDEF) [email protected]-rf $ (cppdef) [email protected]-rf $ (tar_name) #include $ (cdef) #include $ (cppdef) # = = ====================================================================================c++ Tune C>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>$ Cat c.c#------------------------------------------------------ --------------------------------#include int show_student_msg (const char *iname, int iage) {const char *tname = (CONST CH ar*) iname;printf ("Student%s Age:%d\n", Tname, iage); return-1;} # ======================================================================================$ Cat d.cpp#------------- -------------------------------------------------------------------------#include extern "C" {extern int show_ Student_msg (const char *iname, int iage);} int main (int argv, char *argc[]) {std::cout<< "Hello world!" << std::endl;show_student_msg ("Xiaoming", "*tname1", const char = "Xiao Hua"; std::string tname2 (tname1); Show_student_msg (Tname2.c_str (), 24);} # ======================================================================================$ Cat Makefile#---------- ----------------------------------------------------------------------------cc=gcccpp=g++makedepend=gcc-mm- Mtdefinc =ldflags + =-lstdc++csrcs + C.ccppsrcs + = D.CPPCOBJS = $ (CSRCS:.C=.O) Cppobjs = $ (CPPSRCS:.CPP=.O) # CDEF = $ (CSRC S:.C=.D) # Cppdef = $ (CPPSRCS:.CPP=.D) Tar_name=testdef_runtag + = Show_all_paramdef_runtag + $ (TAR_NAME) All: $ (DEF_ Runtag) $ (COBJS):%.o:%.c$ (CC)-C $<-O [email protected]$ (CPPOBJS):%.o:%.cpp$ (CPP)-C $<-O [email  protected]# $ (cdef):%.d:%.c# $ (makedepend) $ (&LT;:.C=.O) $< $ (definc) > [email protected]# $ (CPPDEF):%.d:%. cpp# $ (makedepend) $ (&LT;:.CPP=.O) $< $ (definc) > [email protected]$ (Tar_name): $ (COBJS) $ (CPPOBJS) $ (CPP)-O $ (tar_name) $ (COBJS) $ (CPPOBJS) $ (ldflags) [email protected]-rf $ (COBJS) [email protected]-rf $ (CPPOBJS) [email protected]-rf $ (cdef) [email protected]-rf $ (CPPDEF) Show_all_param: @echo $ (CC) @echo $ (CPP) @echo $ (CSRCS) @echo $ (CPPSRCS) @echo $ (COBJS) @echo $ (CPPOBJS) @echo $ (cdef) @echo $ (cppdef) @echo $ ( Def_runtag) clean:[email protected]-rf $ (COBJS) [email protected]-rf $ (CPPOBJS) [email protected]-rf $ (CDEF) [email protected]-rf $ (cppdef) [email protected]-rf $ (tar_name) #include $ (cdef) #include $ (cppdef) # ======================================================================================

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C and C + + call each other