This can be done using extern C

Syntax of extern C is:

extern "C"

That is for calling C functions from C++ we can write as

extern "C" {





...



}

That is it if we want to include a header file say sample.h in C++ code it is done by declaring it in extern C as follows:

extern "C" {

#include "sample.h"

}

The errors that occur if there is mistake in doing the above would result in linage errors rather than compile time errors.

Say for example instead of declaring as extern C if one declare as extern alone say as

extern char *sample()

then it would return error as referencing error. This is a link error and the reason for its occurrence is C++ compiler encrypts the function name because of its feature of function overloading. So in order to avoid all this confusion and errors the declaration must be

extern "C" {





...



}