Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:11:12: error: cannot bind ‘std::basic_istream<char>’ lvalue to ‘std::basic_istream<char>&&’ f>>v; ^ In file included from /usr/local/include/c++/4.8.0/iostream:40:0, from user.cpp:1: /usr/local/include/c++/4.8.0/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 = int [30000]]’ operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x) ^ user.cpp:15:9: error: expected ‘(’ before ‘x’ x=x-r; ^ user.cpp:15:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses] x=x-r; ^ user.cpp:15:14: error: expected ‘)’ before ‘;’ token x=x-r; ^