View Compilation Error

0_0_35142657_6346.cpp: In member function 'bool node::operator<(const node&) const':
0_0_35142657_6346.cpp:18:22: error: 'const struct node' has no member named 'updown'
         return up==b.updown>b.down: up>b.up;
                      ^
0_0_35142657_6346.cpp:18:35: error: expected ';' before ':' token
         return up==b.updown>b.down: up>b.up;
                                   ^
0_0_35142657_6346.cpp:18:35: error: expected primary-expression before ':' token