View Compilation Error

0_0_13445512_26911.cpp: In function 'int main(int, char**)':
0_0_13445512_26911.cpp:14:9: error: 'cin' was not declared in this scope
  while (cin >> a >> b, !(a == 0 && b == 0))
         ^
0_0_13445512_26911.cpp:15:3: error: 'cout' was not declared in this scope
   cout << pow(a, b) % 1000 << endl;
   ^
0_0_13445512_26911.cpp:15:31: error: 'endl' was not declared in this scope
   cout << pow(a, b) % 1000 << endl;
                               ^