View Compilation Error

0_0_30174068_30450.cpp: In function 'int main()':
0_0_30174068_30450.cpp:10:13: error: cannot bind 'std::istream {aka std::basic_istream<char>}' lvalue to 'std::basic_istream<char>&&'
  while(cin>>str1>>d1>>d2){
             ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:40:0,
                 from 0_0_30174068_30450.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:872:5: note: 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 = std::basic_string<char> [1000]]'
     operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x)
     ^