Main.cc:2:7: error: expected nested-name-specifier before ‘namesapce’
using namesapce std;
^~~~~~~~~
Main.cc: In function ‘int main()’:
Main.cc:7:2: error: ‘cin’ was not declared in this scope
cin >> n;
^~~
Main.cc:7:2: note: suggested alternative:
In file included from Main.cc:1:0:
/usr/include/c++/7/iostream:60:18: note: ‘std::cin’
extern istream cin; /// Linked to standard input
^~~
Main.cc:15:5: error: ‘swap’ was not declared in this scope
swap(a[i] , a[j]);
^~~~
Main.cc:15:5: note: suggested alternatives:
In file included from /usr/include/c++/7/string:52:0,
from /usr/include/c++/7/bits/locale_classes.h:40,
from /usr/include/c++/7/bits/ios_base.h:41,
from /usr/include/c++/7/ios:42,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:1:
/usr/include/c++/7/bits/basic_string.h:6246:5: note: ‘std::swap’
swap(basic_string<_CharT, _Traits, _Alloc>& __lhs,
^~~~
In file included from /usr/include/c++/7/exception:142:0,
from /usr/include/c++/7/ios:39,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:1:
/usr/include/c++/7/bits/exception_ptr.h:166:5: note: ‘std::__exception_ptr::swap’
swap(exception_ptr& __lhs, exception_ptr& __rhs)
^~~~
In file included from /usr/include/c++/7/bits/nested_exception.h:40:0,
from /usr/include/c++/7/exception:143,
from /usr/include/c++/7/ios:39,
from /usr/include/c++/7/ostream:38,
from /usr/include/c++/7/iostream:39,
from Main.cc:1:
/usr/include/c++/7/bits/move.h:187:5: note: ‘std::swap’
swap(_Tp& __a, _Tp& __b)
^~~~
Main.cc:19:3: error: ‘cout’ was not declared in this scope
cout << a[i];
^~~~
Main.cc:19:3: note: suggested alternative:
In file included from Main.cc:1:0:
/usr/include/c++/7/iostream:61:18: note: ‘std::cout’
extern ostream cout; /// Linked to standard output
^~~~