Eroare de compilare: user.cpp:14:11: error: ‘int y1’ redeclared as different kind of symbol int x1,x2,y1,y2; ^ In file included from /usr/include/features.h:357:0, from /usr/include/assert.h:37, from /usr/include/c++/4.8/cassert:43, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:33, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:54:6: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ fin>>x1>>y1>>x2>>y2; ^ In file included from /usr/include/c++/4.8/sstream:38:0, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/istream:872:5: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = double(double)throw ()]’ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) ^ user.cpp:4:11: warning: unused variable ‘first’ [-Wunused-variable] #define x first ^ user.cpp:42:10: note: in expansion of macro ‘x’ int n,i,x,ans=1,d,best,aux,m,st,dr; ^ user.cpp:42:12: warning: unused variable ‘ans’ [-Wunused-variable] int n,i,x,ans=1,d,best,aux,m,st,dr; ^ user.cpp:42:18: warning: unused variable ‘d’ [-Wunused-variable] int n,i,x,ans=1,d,best,aux,m,st,dr; ^ user.cpp:42:20: warning: unused variable ‘best’ [-Wunused-variable] int n,i,x,ans=1,d,best,aux,m,st,dr; ^ user.cpp:42:25: warning: unused variable ‘aux’ [-Wunused-variable] int n,i,x,ans=1,d,best,aux,m,st,dr; ^ In file included from /usr/include/c++/4.8/bits/char_traits.h:39:0, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/sstream:38, from /usr/include/c++/4.8/complex:45, from /usr/include/c++/4.8/ccomplex:38, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/4.8/bits/stl_algobase.h: In instantiation of ‘_ForwardIterator std::lower_bound(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = __gnu_cxx::__normal_iterator<int*, std::vector<int> >; _Tp = double(double)throw ()]’: