View Compilation Error

0_0_37593537_7682.cpp: In member function 'void KDtree::query(int, int, int, node)':
0_0_37593537_7682.cpp:53:51: error: 'k' was not declared in this scope
   int lc = rt << 1, rc = rt << 1 | 1, dim = dep % k, flag = 0;
                                                   ^
0_0_37593537_7682.cpp:59:19: error: 'flag' was not declared in this scope
    que.push(tmp), flag = 1;
                   ^
0_0_37593537_7682.cpp:64:5: error: 'flag' was not declared in this scope
     flag = 1;
     ^
0_0_37593537_7682.cpp:66:17: error: 'flag' was not declared in this scope
   if (sz[rc] && flag)
                 ^