foo.cc:1:1: error: 'include' does not name a type
 include<iostream>
 ^~~~~~~
In file included from /usr/include/c++/7/cmath:43:0,
                 from foo.cc:2:
/usr/include/c++/7/ext/type_traits.h:162:35: error: 'bool __gnu_cxx::__is_null_pointer' redeclared as different kind of symbol
   __is_null_pointer(std::nullptr_t)
                                   ^
/usr/include/c++/7/ext/type_traits.h:157:5: note: previous declaration 'template<class _Type> bool __gnu_cxx::__is_null_pointer(_Type)'
     __is_null_pointer(_Type)
     ^~~~~~~~~~~~~~~~~
/usr/include/c++/7/ext/type_traits.h:162:26: error: 'nullptr_t' is not a member of 'std'
   __is_null_pointer(std::nullptr_t)
                          ^~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:8:5: error: 'cin' was not declared in this scope
     cin >> n ;
     ^~~
foo.cc:8:5: note: suggested alternative: 'sin'
     cin >> n ;
     ^~~
     sin
foo.cc:9:19: error: 'cout' was not declared in this scope
     if ( n < 10 ) cout << n ;
                   ^~~~
foo.cc:9:19: note: suggested alternative: 'cosl'
     if ( n < 10 ) cout << n ;
                   ^~~~
                   cosl
foo.cc:22:21: error: 'cout' was not declared in this scope
         if (m == 0) cout << (num % 10) ;
                     ^~~~
foo.cc:22:21: note: suggested alternative: 'cosl'
         if (m == 0) cout << (num % 10) ;
                     ^~~~
                     cosl
foo.cc:27:14: error: 'cout' was not declared in this scope
              cout << n ;
              ^~~~
foo.cc:27:14: note: suggested alternative: 'cosl'
              cout << n ;
              ^~~~
              cosl
foo.cc:30:5: error: 'cout' was not declared in this scope
     cout << endl ;
     ^~~~
foo.cc:30:5: note: suggested alternative: 'cosl'
     cout << endl ;
     ^~~~
     cosl
foo.cc:30:13: error: 'endl' was not declared in this scope
     cout << endl ;
             ^~~~
foo.cc:30:13: note: suggested alternative: 'ynl'
     cout << endl ;
             ^~~~
             ynl

[Hydro](https://hydro.ac)提供评测服务