#include <iostream>
using std::cout;
using std::endl;
 
inline double fd() { return 1.0; }
extern double d1;
double d2 = d1;     // unspecified:
                    // may be statically initialized to 0.0 or
                    // dynamically initialized to 0.0 if d1 is
                    // dynamically initialized, or 1.0 otherwise
double d1 = fd();   // may be initialized statically or dynamically to 1.0
 
int main() {
    cout << "d1: " << d1 << endl;
    cout << "d2: " << d2 << endl;
}

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