View Compilation Error

0_0_36032836_28601.cpp: In function 'int main()':
0_0_36032836_28601.cpp:6:31: error: 'scanf' was not declared in this scope
  while(scanf("%c%c%c",&a,&b,&c))
                               ^
0_0_36032836_28601.cpp:11:3: error: 'cout' was not declared in this scope
   cout<<a<<b<<c;
   ^