View Compilation Error

0_0_35543087_26547.cpp: In function 'int bfs(int)':
0_0_35543087_26547.cpp:8:2: error: expected ';' before 'queue'
  queue<int>q;
  ^
0_0_35543087_26547.cpp:9:2: error: 'q' was not declared in this scope
  q.push(x);
  ^