c++ - invalid operands to binary expression ('std::__1::basic_ostream<char>' and 'ostream' (aka 'basic_ostream<char>')) std::cout<<check<<std::cout; -

i'm trying solve standard interview question. i've vector each element vector of ints. v[0] employee 0 , vector of ints in v[0] number of employees reporting him, 2,3,5. if v[2] has 7 indirectly 7 reports employee 0 through 2. question find function takes in 2 ints , b , vector of dependencies , if reports b, directly or indirectly.

here's bfs logic

bool dependencylist(int a, int b, std::vector<std::vector<int>>& v){      std::queue<int> q;     std::vector<int> d;     std::unordered_map<int, int> m;      for(auto = v[b].begin(); it!= v[b].end(); it++){         q.push(*it);         d.push_back(*it);         m[*it] = 1;      }     while(!q.empty()){         int num = q.front();         for(auto = v[num].begin(); != v[num].end(); it++){             if(m.find(*it) == m.end()){                 d.push_back(*it);                 m[*it] =1;                 q.push(*it);             }         }         q.pop();     }      for(auto it= d.begin(); it!= d.end(); it++){         if(*it == a) return true;     }     return false;  } 

here's driver code

int main() {      std::vector<int> v0;     v0.push_back(2);     v0.push_back(3);     v0.push_back(7);      std::vector<int> v1;     v1.push_back(4);     v1.push_back(9);     v1.push_back(11);      std::vector<int> v2;     v2.push_back(3);     v2.push_back(5);      std::vector<int> v3;     v3.push_back(8);     v3.push_back(6);      std::vector<std::vector<int>> v;     v.push_back(v0);     v.push_back(v1);     v.push_back(v2);     v.push_back(v3);      bool check = dependencylist(6,0,v);      std::cout<<check<<std::cout;      return 0; } 

here's error get

invalid operands binary expression ('std::__1::basic_ostream<char>' , 'ostream' (aka 'basic_ostream<char>'))     std::cout<<check<<std::cout;     ~~~~~~~~~~~~~~~~^ ~~~~~~~~~ 

try removing std::cout; expression std::cout<<check<<std::cout;if compile code using gnu g++ compiler, compiles fine. if compile using visual c++ compiler (c++11 tested with) gives error.

with g++ compiler displays address of object std::cout. if want display address, try std::cout<<check<<&std::cout;