Eroare de compilare: user.cpp: In function ‘void div(int, int)’: user.cpp:28:6: error: ambiguating new declaration of ‘void div(int, int)’ void div (int a, int b) ^~~ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/c++/6/ext/string_conversions.h:41, from /usr/include/c++/6/bits/basic_string.h:5417, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/ostream:38, from /usr/include/c++/6/iostream:39, from user.cpp:3: /usr/include/stdlib.h:788:14: note: old declaration ‘div_t div(int, int)’ extern div_t div (int __numer, int __denom) ^~~