/in/foo.cc: In function 'int main()':
/in/foo.cc:4:7: warning: unknown escape sequence: '\/'
    4 | cout<<"\\    \/\\    \/\n";
      |       ^~~~~~~~~~~~~~~~~~~~
/in/foo.cc:4:7: warning: unknown escape sequence: '\/'
/in/foo.cc:5:7: warning: unknown escape sequence: '\/'
    5 | cout<<" \\  \/  \\  \/\n";
      |       ^~~~~~~~~~~~~~~~~~~
/in/foo.cc:5:7: warning: unknown escape sequence: '\/'
/in/foo.cc:6:7: warning: unknown escape sequence: '\/'
    6 | cout<<"  \\\/    \\\/\n";
      |       ^~~~~~~~~~~~~~~~~~
/in/foo.cc:6:7: warning: unknown escape sequence: '\/'