View Compilation Error

0_0_21689640_31881.cpp: In function 'void DFS(Node*)':
0_0_21689640_31881.cpp:23:39: error: 'typeof' was not declared in this scope
 #define Travel(x) for(typeof(x.begin()) it = x.begin(); it != x.end(); ++it)
                                       ^
0_0_21689640_31881.cpp:107:2: note: in expansion of macro 'Travel'
  Travel(Now -> Ask)
  ^
0_0_21689640_31881.cpp:23:57: error: 'it' was not declared in this scope
 #define Travel(x) for(typeof(x.begin()) it = x.begin(); it != x.end(); ++it)
                                                         ^
0_0_21689640_31881.cpp:107:2: note: in expansion of macro 'Travel'
  Travel(Now -> Ask)
  ^