How do you declare an extern “C” function pointer

Question

So I have this code:

#include \"boost_bind.h\"
#include 
#include 
#include 

double foo(double num, double (*func)(         


        

Answer 1

Try using a typedef:

extern "C" {
  typedef double (*CDoubleFunc)(double);
}

double foo(double num, CDoubleFunc func) {
  return 65.4;
}