View Compilation Error

0_0_35042319_7518.cpp:2:1: error: 'include' does not name a type
 include <iostream>
 ^
0_0_35042319_7518.cpp: In function 'int main()':
0_0_35042319_7518.cpp:6:8: error: 'cin' was not declared in this scope
  while(cin>>n)
        ^
0_0_35042319_7518.cpp:15:3: error: 'cout' was not declared in this scope
   cout<<sum<<endl;
   ^
0_0_35042319_7518.cpp:15:14: error: 'endl' was not declared in this scope
   cout<<sum<<endl;
              ^