Compilare: user.cpp: In member function ‘int Nr::add(Nr)’: user.cpp:21:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int Nr::scad(Nr)’: user.cpp:39:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:43:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.in", "r", stdin); ^ user.cpp:44:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.out", "w", stdout); ^