View Compilation Error

0_0_27952530_32439.cpp: In function 'int bfs(node)':
0_0_27952530_32439.cpp:63:4: error: 'else' without a previous 'if'
    else if(road[xx][yy][now.level]==-1){//是传送机 
    ^
0_0_27952530_32439.cpp:64:38: error: 'level' was not declared in this scope
     next.x=xx;next.y=yy;next.level=1-level;next.time=now.time+1; 
                                      ^