View Compilation Error

626511_0_0_28343.cpp: In function `int BFS(int)':
626511_0_0_28343.cpp:6: error: `que' undeclared (first use this function)
626511_0_0_28343.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
626511_0_0_28343.cpp:6: error: `memset' undeclared (first use this function)
626511_0_0_28343.cpp:10: error: `dis' undeclared (first use this function)
626511_0_0_28343.cpp:15: error: `min' undeclared (first use this function)
626511_0_0_28343.cpp:17: error: `index' undeclared (first use this function)
626511_0_0_28343.cpp:17: error: `edge' undeclared (first use this function)