#include <iostream>
 class AE {
        // ...
    public:
        static const int c6 = 7;
        static const int c7 = 31;
    };
    const int AE::c7;   // definition
    int f()
    {
        const int* p1 = &AE::c6;    // error: c6 not an lvalue
        const int* p2 = &AE::c7;    // ok
        // ...
    }
 
 int main(){
 	
 }