View Compilation Error

0_0_10802900_8922.cpp: In member function `void ACAutomation::Trie::init()':
0_0_10802900_8922.cpp:47: error: `node' undeclared (first use this function)
0_0_10802900_8922.cpp:47: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10802900_8922.cpp: In member function `void ACAutomation::build()':
0_0_10802900_8922.cpp:78: error: `root' undeclared (first use this function)