/in/foo.cc: In function 'int main()':
/in/foo.cc:5:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckwckwckwckwckwckwckwckwckwckwckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:6:8: error: unable to find string literal operator 'operator""endl' with 'const char [7]', 'long unsigned int' arguments
  cout<<"ckwckw"endl;
        ^~~~~~~~~~~~
/in/foo.cc:7:8: error: unable to find string literal operator 'operator""endl' with 'const char [17]', 'long unsigned int' arguments
  cout<<"ckwccccckkwwwckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:8:8: error: unable to find string literal operator 'operator""endl' with 'const char [13]', 'long unsigned int' arguments
  cout<<"ckwckkwwwckw"endl;
        ^~~~~~~~~~~~~~~~~~
/in/foo.cc:9:8: error: unable to find string literal operator 'operator""endl' with 'const char [13]', 'long unsigned int' arguments
  cout<<"ckwckwwwwckw"endl;
        ^~~~~~~~~~~~~~~~~~
/in/foo.cc:10:8: error: unable to find string literal operator 'operator""endl' with 'const char [14]', 'long unsigned int' arguments
  cout<<"ckwckkwwwwckw"endl;
        ^~~~~~~~~~~~~~~~~~~
/in/foo.cc:11:8: error: unable to find string literal operator 'operator""endl' with 'const char [16]', 'long unsigned int' arguments
  cout<<"ckwccccckkwwckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:12:8: error: unable to find string literal operator 'operator""endl' with 'const char [7]', 'long unsigned int' arguments
  cout<<"ckwckw"endl;
        ^~~~~~~~~~~~
/in/foo.cc:13:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckwckwckwckwckwckwckwckwckwckwckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~