Eroare de compilare: user.cpp:6:17: error: ‘int y1’ redeclared as different kind of symbol int T,N,M,x1,x2,y1,y2; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/cstdio:41, 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:14:58: warning: format ‘%d’ expects argument of type ‘int*’, but argument 5 has type ‘double (*)(double)throw ()’ [-Wformat=] scanf("%d %d %d %d %d %d\n",&N,&M,&x1,&y1,&x2,&y2); ^ user.cpp:15:17: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(y1 > y2)swap(x1,x2),swap(y1,y2); ^ user.cpp:15:42: error: no matching function for call to ‘swap(double (&)(double)throw (), int&)’ if(y1 > y2)swap(x1,x2),swap(y1,y2); ^ user.cpp:15:42: note: candidates are: In file included from /usr/include/c++/4.8/bits/stl_pair.h:59:0, from /usr/include/c++/4.8/utility:70, from /usr/include/c++/4.8/algorithm:60, from user.cpp:2: /usr/include/c++/4.8/bits/move.h:166:5: note: template<class _Tp> void std::swap(_Tp&, _Tp&) swap(_Tp& __a, _Tp& __b) ^ /usr/include/c++/4.8/bits/move.h:166:5: note: template argument deduction/substitution failed: user.cpp:15:42: note: deduced conflicting types for parameter ‘_Tp’ (‘double(double)throw ()’ and ‘int’) if(y1 > y2)swap(x1,x2),swap(y1,y2); ^ In file included from /usr/include/c++/4.8/bits/stl_pair.h:59:0, from /usr/include/c++/4.8/utility:70, from /usr/include/c++/4.8/algorithm:60, from user.cpp:2: /usr/include/c++/4.8/bits/move.h:185:5: note: template<class _Tp, unsigned int _Nm> void std::swap(_Tp (&)[_Nm], _Tp (&)[_Nm]) swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm]) ^ /usr/include/c++/4.8/bits/move.h:185:5: note: template argument deduction/substitution failed: user.cpp:15:42: note: mismatched types ‘_Tp [_Nm]’ and ‘double(double)throw ()’ if(y1 > y2)swap(x1,x2),swap(y1,y2); ^ In file included from /usr/include/c++/4.8/utility:70:0, from /usr/include/c++/4.8/algorithm:60, from user.cpp:2: /usr/include/c++/4.8/bits/stl_pair.h:254:5: note: template<class _T1, class _T2> void std::swap(std::pair<_T1, _T2>&, std::pair<_T1, _T2>&) swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y) ^