Problem	exam
User	Haocheng
Submission Time	2024-11-07 10:20:23
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

exam.cpp:2:17: error: ‘atd’ is not a namespace-name
2 | using namespace atd;
| ^~~
exam.cpp: In function ‘int32_t main()’:
exam.cpp:7:2: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
7 | cin >> x;
| ^~~
| std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:75,
from exam.cpp:1:
/usr/include/c++/9/iostream:60:18: note: ‘std::cin’ declared here
60 | extern istream cin; /// Linked to standard input
| ^~~
exam.cpp:9:3: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
9 | cout << "Hello World\n";
| ^~~~
| std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:75,
from exam.cpp:1:
/usr/include/c++/9/iostream:61:18: note: ‘std::cout’ declared here
61 | extern ostream cout; /// Linked to s