Accessing C++ codes from C codes

C and C++ are close cousins but I have never tried mixing both codes in one project before. I encountered such a need to mix codes just recently due to work. It is quite difficult to scour the net for reference. And after long hours of experimentation I was able to access C++ codes in my C codes.
Here are the steps:

C main file:

Call the C++ interface

void the_cpp_interface();

C++ header file:

Define wrapper and class:

#ifdef __cplusplus 

extern “C” { void the_cpp_interface()};

 #endif

class cppClass

{

 Public:

                Void cppTestFunc();

                cppClass() {};

}

               

C++ source file:

extern “C” void the_cpp_interface()

{

                //your c++ codes here

}

//class defn

myClass::cppTestFunc()

{

             // codes here

}