Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:38: error: invalid initialization of reference of type ‘int&’ from expression of type ‘long long int’ user.cpp:8: error: in passing argument 4 of ‘void gcd_ext(int, int, int&, int&, int&)’ user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result