View Compilation Error

0_0_35510030_16074.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_35510030_16074.cpp: In function 'int main()':
0_0_35510030_16074.cpp:9:23: error: 'scanf' was not declared in this scope
  while (scanf("%d", &n), n)
                       ^
0_0_35510030_16074.cpp:14:4: error: 'cin' was not declared in this scope
    cin >> a;
    ^
0_0_35510030_16074.cpp:17:21: error: 'printf' was not declared in this scope
   printf("%d\n", sum);
                     ^