View Compilation Error

0_0_26466768_14148.cpp: In function 'int main()':
0_0_26466768_14148.cpp:7:9: error: 'cin' was not declared in this scope
  while (cin >> n && n)
         ^
0_0_26466768_14148.cpp:32:3: error: 'cout' was not declared in this scope
   cout << nega << " " << zero << " " << posi << " " << endl;
   ^
0_0_26466768_14148.cpp:32:56: error: 'endl' was not declared in this scope
   cout << nega << " " << zero << " " << posi << " " << endl;
                                                        ^