#include <iostream>
#include <string>
class C {
const std::string& cs;
public:
C(const std::string& s) : cs(s) {}
void print() const { std::cout << cs << std::endl; }
};
int main() {
    std::string s("test");
    C c(s);
    c.print();
    return 0;
}
/* end */