Eroare de compilare: user.cpp:7:63: error: ‘int y0’ redeclared as different kind of symbol int k1,k2,a[205][205],dx[]={-1,0,1,0},dy[]={0,-1,0,1},cont,x0,y0,m,p,n,nrlin,nrcol; ^ 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:242:1: error: previous declaration of ‘double y0(double)’ __MATHCALL (y0,, (_Mdouble_)); ^ user.cpp:8:33: error: ‘int y1 [205]’ redeclared as different kind of symbol int x[205],y[205],x1[205],y1[205],y2[205],x2[205]; ^ 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:45:25: warning: pointer to a function used in arithmetic [-Wpointer-arith] fin>>x1[i]>>y1[i]>>x2[i]>>y2[i]; ^ user.cpp:45:12: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ fin>>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:48:16: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(y1[i]==0)y0++; ^ user.cpp:48:23: error: ISO C++ forbids incrementing a pointer of type ‘double (*)(double)throw ()’ [-fpermissive] if(y1[i]==0)y0++; ^ user.cpp:48:23: error: lvalue required as increment operand user.cpp:49:16: warning: pointer to a function used in arithmetic [-Wpointer-arith] if(y1[i]==p)y0++; ^ user.cpp:49:19: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(y1[i]==p)y0++; ^ user.cpp:49:23: error: ISO C++ forbids incrementing a pointer of type ‘double (*)(double)throw ()’ [-fpermissive] if(y1[i]==p)y0++; ^