Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:5:50: error: no match for ‘operator^’ (operand types are ‘std::basic_ostream<char>’ and ‘int’) int main() { int a, b; i >> a >> b; o << (a - 1) ^ (b - 1); } ~~~~~~~~~~~~~^~~~~~~~~ user.cpp:5:50: note: candidate: operator^(int, int) <built-in> user.cpp:5:50: note: no known conversion for argument 1 from ‘std::basic_ostream<char>’ to ‘int’ In file included from /usr/include/c++/6/ios:42:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/c++/6/bits/ios_base.h:91:3: note: candidate: constexpr std::_Ios_Fmtflags std::operator^(std::_Ios_Fmtflags, std::_Ios_Fmtflags) operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b) ^~~~~~~~ /usr/include/c++/6/bits/ios_base.h:91:3: note: no known conversion for argument 1 from ‘std::basic_ostream<char>’ to ‘std::_Ios_Fmtflags’ /usr/include/c++/6/bits/ios_base.h:133:3: note: candidate: constexpr std::_Ios_Openmode std::operator^(std::_Ios_Openmode, std::_Ios_Openmode) operator^(_Ios_Openmode __a, _Ios_Openmode __b) ^~~~~~~~ /usr/include/c++/6/bits/ios_base.h:133:3: note: no known conversion for argument 1 from ‘std::basic_ostream<char>’ to ‘std::_Ios_Openmode’ /usr/include/c++/6/bits/ios_base.h:173:3: note: candidate: constexpr std::_Ios_Iostate std::operator^(std::_Ios_Iostate, std::_Ios_Iostate) operator^(_Ios_Iostate __a, _Ios_Iostate __b) ^~~~~~~~ /usr/include/c++/6/bits/ios_base.h:173:3: note: no known conversion for argument 1 from ‘std::basic_ostream<char>’ to ‘std::_Ios_Iostate’