コンパイルエラー

./Main.cpp: In function 'int main()':
./Main.cpp:5:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    5 |   cout << 10 << endl;
      |   ^~~~
      |   std::cout
In file included from ./Main.cpp:1:
/usr/include/c++/12/iostream:61:18: note: 'std::cout' declared here
   61 |   extern ostream cout;          /// Linked to standard output
      |                  ^~~~
./Main.cpp:5:17: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    5 |   cout << 10 << endl;
      |                 ^~~~
      |                 std::endl
In file included from /usr/include/c++/12/iostream:39:
/usr/include/c++/12/ostream:688:5: note: 'std::endl' declared here
  688 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~