/in/foo.cc: In function 'int main()':
/in/foo.cc:4:8: warning: unknown escape sequence: '\/'
    4 |  cout<<"\\    \/\\    \/"<<endl;
      |        ^~~~~~~~~~~~~~~~~~
/in/foo.cc:4:8: warning: unknown escape sequence: '\/'
/in/foo.cc:5:8: warning: unknown escape sequence: '\/'
    5 |  cout<<" \\  \/  \\  \/"<<endl;
      |        ^~~~~~~~~~~~~~~~~
/in/foo.cc:5:8: warning: unknown escape sequence: '\/'
/in/foo.cc:6:8: warning: unknown escape sequence: '\/'
    6 |  cout<<"  \\\/    \\\/" <<endl;
      |        ^~~~~~~~~~~~~~~~
/in/foo.cc:6:8: warning: unknown escape sequence: '\/'