#define lambda(type, function_body) \
({ \
   type __fn__ function_body \
   __fn__; \
   })

#define print(x) (_Generic((x), \
   _Bool: lambda(void, (void) { printf("%s ", x ? "true": "false"); }), \
   int: lambda(void, (void) { printf("%d ", x); }), \
   char*: lambda(void, (void) { printf("%s\n", x); }) \
)())

   void for_each(void *arr, size_t size, size_t elemS, void (*f)(void*)) {
   for (size_t i = 0; i < size; ++i)
       f(arr + (i * elemS));
   }

int main(void) {
   int arr[7] = {1,3,4,9,0,2,8};
   void (*fun)(void) = lambda(void, (void) { printf("%s\n", "It work\'s"); });
   for_each(arr, 7, sizeof(int), lambda( void, (void *elem) { print(*(int*)elem); } ));
      printf("\n");
   fun();
   print("Bye!");
   return 0;
}