Main.cc: In function 'int main()':
Main.cc:6:8: error: no match for 'operator<<' (operand types are 'std::istream {aka std::basic_istream}' and 'float')
cin< std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
operator<<(basic_ostream<_CharT, _Traits>& __os,
^
/usr/include/c++/5/bits/basic_string.h:5172:5: note: template argument deduction/substitution failed:
Main.cc:6:13: note: 'std::istream {aka std::basic_istream}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
cin<