I am using Dev-C++ with lambda expression and building a DLL.

In Dev-C++, when the program is used as a exe.It works fine.

But I want to make it a class (i.e.classA in the following)in a DLL for other exes to use it.

And the error occured:

In dll.cpp:

.................

void classA::a()

..........................

 (while_loop(bind(&isprime,_1)==false, ++var(result))(middlevalue);

.......................

where bool isprime(int) is also a member function of classA.

But the complier told me that:

ISO C++ forbids taking the address of an unqualified
   non-static member function to form a pointer to member function.

I do not know how to solve it.

Can anyone with kindness help me?