Compilare: user.cpp: In member function ‘numar numar::operator=(numar)’: user.cpp:67:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘void numar::print_number()’: user.cpp:69:26: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘ull {aka long long unsigned int}’ [-Wformat=] printf("%d", c[k]); ^ user.cpp:71:32: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘ull {aka long long unsigned int}’ [-Wformat=] printf("%08d", c[i]); ^ user.cpp: In function ‘int main()’: user.cpp:102:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algebra2.in","r",stdin); ^ user.cpp:103:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("algebra2.out","w",stdout); ^