View Compilation Error

0_0_22226256_14292.cpp:17:2: error: expected unqualified-id before 'if'
  if(opr==npr&&opc==npc)return true;
  ^
0_0_22226256_14292.cpp:20:8: error: expected constructor, destructor, or type conversion before '(' token
  memset(bvis,0,sizeof bvis);
        ^
0_0_22226256_14292.cpp:21:2: error: 'q' does not name a type
  q.push(make_pair(opr,opc));
  ^
0_0_22226256_14292.cpp:22:2: error: 'bvis' does not name a type
  bvis[opr][opc]=1;
  ^
0_0_22226256_14292.cpp:23:2: error: expected unqualified-id before 'while'
  while(!q.empty()){
  ^