View Compilation Error

0_0_37109682_22392.cpp: In function 'll bfs(int, int, int, int)':
0_0_37109682_22392.cpp:19:40: error: 'dfs' was not declared in this scope
    if(x==4) ans+=dfs(cur+1,i,f&(i==v),1);
                                        ^
0_0_37109682_22392.cpp:20:36: error: 'dfs' was not declared in this scope
    else ans+=dfs(cur+1,i,f&(i==v),g);
                                    ^
0_0_37109682_22392.cpp:22:35: error: 'dfs' was not declared in this scope
   else ans+=dfs(cur+1,i,f&(i==v),g);
                                   ^