Eroare de compilare: user.cpp:11:14: error: ‘int y1’ redeclared as different kind of symbol int n,m,i,x1,y1,x2,y2,ok,st,dr,tg1,tg2,mij; ^ 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:24:10: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ f>>x1>>y1; ^ 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:25:22: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] R[i]=tg(x1,y1); ^ user.cpp:14:8: error: initializing argument 2 of ‘double tg(int, int)’ [-fpermissive] double tg(int x, int y) ^ user.cpp:35:10: error: cannot bind ‘std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’ f>>x1>>y1; ^ 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:37:19: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] a=tg(x1,y1); ^ user.cpp:14:8: error: initializing argument 2 of ‘double tg(int, int)’ [-fpermissive] double tg(int x, int y) ^