/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 [34]', 'long unsigned int' arguments
  cout<<"ckw                           ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw  ccccc  k   k  w   w   w  ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:8:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw  c      k k    w   w   w  ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:9:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw  c      k      w w   w w  ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:10:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw  c      k k    w w   w w  ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:11:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw  ccccc  k   k  w       w  ckw"endl;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:12:8: error: unable to find string literal operator 'operator""endl' with 'const char [34]', 'long unsigned int' arguments
  cout<<"ckw                           ckw"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;
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~