Eroare de compilare: user.cpp:7:27: error: ‘int y1 [100]’ redeclared as different kind of symbol int x1[100],x2[100],y1[100],y2[100],x[100],y[100],v[100],w[100],qx,qy,e,r,n,m,p,nr; ^ 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/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream: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 exist(int, int)’: user.cpp:23:44: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(x1[p]<=v[i]&&v[i+1]<=x2[p]&&y1[p]<=w[j]&&w[j+1]<=y2[p]) ^ user.cpp:23:50: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(x1[p]<=v[i]&&v[i+1]<=x2[p]&&y1[p]<=w[j]&&w[j+1]<=y2[p]) ^ user.cpp: In function ‘int main()’: user.cpp:32:25: warning: pointer to a function used in arithmetic [-Wpointer-arith] fin>>x1[k]>>y1[k]>>x2[k]>>y2[k]; ^ user.cpp:32:12: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ fin>>x1[k]>>y1[k]>>x2[k]>>y2[k]; ^ In file included from /usr/include/c++/4.8/fstream:38:0, 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:35:20: warning: pointer to a function used in arithmetic [-Wpointer-arith] y[++r]=y1[k]; ^ user.cpp:35:20: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive]