View Compilation Error

0_0_21394757_931.cpp: In function 'void query(node, int, int)':
0_0_21394757_931.cpp:81:24: error: 'y' was not declared in this scope
         id = 1;query(p,y,dept+1);
                        ^
0_0_21394757_931.cpp:84:13: error: 'x' was not declared in this scope
     query(p,x,dept+1);
             ^
0_0_21394757_931.cpp:89:24: error: 'y' was not declared in this scope
        if(!id) query(p,y,dept+1); else query(p,x,dept+1); 
                        ^
0_0_21394757_931.cpp:89:48: error: 'x' was not declared in this scope
        if(!id) query(p,y,dept+1); else query(p,x,dept+1); 
                                                ^