View Compilation Error

0_0_17564438_4919.cpp: In function 'void dfs(int, int, int)':
0_0_17564438_4919.cpp:25:19: error: 'bfs' was not declared in this scope
   bfs(time,xx,yy+1);
                   ^
0_0_17564438_4919.cpp:34:19: error: 'bfs' was not declared in this scope
   bfs(time,xx+1,yy);
                   ^
0_0_17564438_4919.cpp:43:19: error: 'bfs' was not declared in this scope
   bfs(time,xx-1,yy);
                   ^
0_0_17564438_4919.cpp:54:19: error: 'bfs' was not declared in this scope
   bfs(time,xx,yy-1);
                   ^