Eroare de compilare: user.cpp:13:62: error: ‘int y1 [20005]’ redeclared as different kind of symbol int n,m,k,a[305][305],st[20005],dr[20005],x1[20005],y1[20005],x2[20005],y2[20005],eq[90005],dad[90005]; ^ 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/iostream:38, 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:86:21: warning: pointer to a function used in arithmetic [-Wpointer-arith] { f>>x1[i]>>y1[i]>>x2[i]>>y2[i]; ^ user.cpp:86:8: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ { f>>x1[i]>>y1[i]>>x2[i]>>y2[i]; ^ In file included from /usr/include/c++/4.8/iostream:40:0, 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:111:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<pos[nr].size();j++) ^ user.cpp:113:30: warning: pointer to a function used in arithmetic [-Wpointer-arith] if (Gr(El(x1[p],y1[p]))==Gr(El(x2[p],y2[p]))) ^ user.cpp:113:30: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] user.cpp:36:6: error: initializing argument 2 of ‘int El(int, int)’ [-fpermissive] int El(int i,int j) ^