0_0_39798466_2635.cpp:2:7: error: expected nested-name-specifier before 'spacename'
2 | using spacename std;
| ^~~~~~~~~
0_0_39798466_2635.cpp: In function 'int main()':
0_0_39798466_2635.cpp:13:9: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
13 | cin>>n;
| ^~~
| std::cin
In file included from 0_0_39798466_2635.cpp:1:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:62:18: note: 'std::cin' declared here
62 | extern istream cin; ///< Linked to standard input
| ^~~
0_0_39798466_2635.cpp:15:9: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
15 | cout<<su<<endl;
| ^~~~
| std::cout
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:63:18: note: 'std::cout' declared here
63 | extern ostream cout; ///< Linked to standard output
| ^~~~
0_0_39798466_2635.cpp:15:19: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
15 | cout<<su<<endl;
| ^~~~
| std::endl
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/iostream:41:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:735:5: note: 'std::endl' declared here
735 | endl(basic_ostream<_CharT, _Traits>& __os)
| ^~~~
|
