View Compilation Error

0_0_8971043_9153.cpp: In function `int bfs(int, int)':
0_0_8971043_9153.cpp:41: error: `dir' undeclared (first use this function)
0_0_8971043_9153.cpp:41: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8971043_9153.cpp:43: error: `judge' undeclared (first use this function)