Eroare de compilare: main.cpp: In function 'bool div(int, int)': main.cpp:7:6: error: ambiguating new declaration of 'bool div(int, int)' bool div(int x,int y) ^~~ 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:5420, 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/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/stdlib.h:788:14: note: old declaration 'div_t div(int, int)' extern div_t div (int __numer, int __denom) ^~~ main.cpp: In function 'int main()': main.cpp:35:24: error: no match for 'operator==' (operand types are 'div_t' and 'bool') if(div(i,j)==true) ~~~~~~~~^~~~~~ In file included from /usr/include/c++/6/iosfwd:40:0, from /usr/include/c++/6/ios:38, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/postypes.h:216:5: note: candidate: template<class _StateT> bool std::operator==(const std::fpos<_StateT>&, const std::fpos<_StateT>&) operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs) ^~~~~~~~ /usr/include/c++/6/bits/postypes.h:216:5: note: template argument deduction/substitution failed: main.cpp:35:26: note: 'div_t' is not derived from 'const std::fpos<_StateT>' if(div(i,j)==true) ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:64:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/bits/stl_pair.h:435:5: note: candidate: template<class _T1, class _T2> constexpr bool std::operator==(const std::pair<_T1, _T2>&, const std::pair<_T1, _T2>&) operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y) ^~~~~~~~ /usr/include/c++/6/bits/stl_pair.h:435:5: note: template argument deduction/substitution failed: main.cpp:35:26: note: 'div_t' is not derived from 'const std::pair<_T1, _T2>' if(div(i,j)==true) ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:67:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, Non zero exit status: 1