View Compilation Error

0_0_32969391_30411.cpp: In function 'int query(int, int, int)':
0_0_32969391_30411.cpp:55:30: error: 'left_node' was not declared in this scope
   int max_left  = query_tree(left_node,start,mid,L,R);
                              ^
0_0_32969391_30411.cpp:55:40: error: 'start' was not declared in this scope
   int max_left  = query_tree(left_node,start,mid,L,R);
                                        ^
0_0_32969391_30411.cpp:55:50: error: 'L' was not declared in this scope
   int max_left  = query_tree(left_node,start,mid,L,R);
                                                  ^
0_0_32969391_30411.cpp:55:52: error: 'R' was not declared in this scope
   int max_left  = query_tree(left_node,start,mid,L,R);
                                                    ^
0_0_32969391_30411.cpp:55:53: error: 'query_tree' was not declared in this scope
   int max_left  = query_tree(left_node,start,mid,L,R);
                                                     ^
0_0_32969391_30411.cpp:56:30: error: 'right_node' was not declared in this scope
   int max_right = query_tree(right_node,mid+1,end,L,R);
                              ^