Main.cc: In function 'int main()':
Main.cc:11:20: error: no matching function for call to 'floor(int&, int&)'
cout< constexpr typename __gnu_cxx::__enable_if::__value, double>::__type std::floor(_Tp)
floor(_Tp __x)
^
/usr/include/c++/5/cmath:291:5: note: template argument deduction/substitution failed:
Main.cc:11:20: note: candidate expects 1 argument, 2 provided
cout<