View Compilation Error

0_0_36767132_15013.cpp: In function 'int main()':
0_0_36767132_15013.cpp:4:9: error: 'cin' was not declared in this scope
  while (cin >> a >> b >> c)
         ^
0_0_36767132_15013.cpp:24:3: error: 'cout' was not declared in this scope
   cout << a << ' ' << b << ' ' << c << endl;
   ^
0_0_36767132_15013.cpp:24:40: error: 'endl' was not declared in this scope
   cout << a << ' ' << b << ' ' << c << endl;
                                        ^