Main.cc: In function ‘int main()’:
Main.cc:4:5: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
4 | cout << "1";
| ^~~~
| std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:75,
from Main.cc:1:
/usr/include/c++/11/iostream:61:18: note: ‘std::cout’ declared here
61 | extern ostream cout; /// Linked to standard output
| ^~~~