foo.cc:5:11: warning: missing terminating " character
    5 |     cout<<"ckwckwckwckwckwckwckwckwckwckwckw
      |           ^
foo.cc:5:11: error: missing terminating " character
    5 |     cout<<"ckwckwckwckwckwckwckwckwckwckwckw
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:13:34: warning: missing terminating " character
   13 | ckwckwckwckwckwckwckwckwckwckwckw";
      |                                  ^
foo.cc:13:34: error: missing terminating " character
   13 | ckwckwckwckwckwckwckwckwckwckwckw";
      |                                  ^~
foo.cc: In function 'int main()':
foo.cc:5:5: error: 'cout' was not declared in this scope
    5 |     cout<<"ckwckwckwckwckwckwckwckwckwckwckw
      |     ^~~~
foo.cc:2:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
foo.cc:6:1: error: 'ckw' was not declared in this scope
    6 | ckw                           ckw
      | ^~~

[Hydro](https://hydro.ac)提供评测服务