is it possible in C or C++ to create a function inside another?

Question

Could someone please tell me if this is possible in C or C++?

void fun_a();
//int fun_b();
...
main(){
   ...
   fun_a();
   ...
   int fun_b(){
     ...
            


        

Answer 1

you can't create a function inside another function in C++.

You can however create a local class functor:

int foo()
{
   class bar
   {
   public:
      int operator()()
      {
         return 42;
      }
   };
   bar b;
   return b();
}

in C++0x you can create a lambda expression:

int foo()
{
   auto bar = []()->int{return 42;};
   return bar();
}