🚀 go-pugleaf

jason@ab02.larc.nasa.gov (Jason Austin) writes:

>class Test {
>public:
>  Test();
>  ~Test();
>
>private:
>  int (*fp)();
>
>  int testfunction();
>};
>
>int Test::testfunction() {}
>
>Test::Test() {
>  fp=testfunction;
>}
>
>Test::~Test() {}
>
>int testfunction() {}
>
>main()
>{
>  int (*fp)();
>
>  fp=testfunction;
>}
>
>	Why does the assignment in main() compile but the one in
>Test::Test() reports "assignment between incompatible pointer types".
>I'm using g++ 2.5.6.  Thanks.

Because Test::testfunction is a (non-static) member function, not an ordinary
function, and you can't assign a pointer to member function to
a pointer to non-member function.  You can get it to work by making
Test::testfunction a static member function.

I suggest that you look up "static member function" and "pointer to
member" in the index of good C++ book.

-- 
Fergus Henderson                     fjh@munta.cs.mu.OZ.AU