algola.cpp: In function 'bool dfs()': algola.cpp:49: warning: 'auto' will change meaning in C++0x; please remove it algola.cpp:49: error: expected initializer before ':' token algola.cpp:120: error: expected primary-expression at end of input algola.cpp:120: error: expected ';' at end of input algola.cpp:120: error: expected primary-expression at end of input algola.cpp:120: error: expected ')' at end of input algola.cpp:120: error: expected statement at end of input algola.cpp:120: error: expected '}' at end of input algola.cpp:47: warning: unused variable 'node' algola.cpp:120: error: expected '}' at end of input algola.cpp:120: warning: no return statement in function returning non-void