View Compilation Error

428106_0_0_29352.cpp: In function `void bfs()':
428106_0_0_29352.cpp:68: error: `tmpx' undeclared (first use this function)
428106_0_0_29352.cpp:68: error: (Each undeclared identifier is reported only once for each function it appears in.)
428106_0_0_29352.cpp:68: error: `tmpy' undeclared (first use this function)