c++ - Passing an object to a function taking a reference, an interview test -

i had interesting (or stupid) interview question. well, know code below not compile, not give answer on how modify class c make code compile. told answers test(c(1)); or void test(c c) unacceptable. can me?

here's question:

q11. following code compile? if not, make changes want class c in order code compile.

class c { public:     c(int i) {}     ~c() {} };  void test(c &c) { }  int main(int, char*) {     test(1);     return 0; } 

the code not compile.

there no way make compile changing class c first because signature main wrong (char* never type of second argument).

but if signature of main correct test(1); wants implicitly create temporary object of c , pass test. however, cannot bind temporary non-const reference, , can't see way change class c create implicit temporary can bind parameter test.

edit: closest i've come putting friend void test(int i) { } c. compile sun's cc compiler fails compile g++ 4.4, 4.5, or 4.8 ideone. edit2: appears 11.4/5 g++ correct here: function introduced scope of class, not enclosing scope.