View Compilation Error

0_0_18833660_22137.cpp:1:1: error: 'include' does not name a type
 include <iostream>
 ^
0_0_18833660_22137.cpp: In function 'int main(int, char**)':
0_0_18833660_22137.cpp:6:8: error: 'cin' was not declared in this scope
  while(cin>>n)
        ^
0_0_18833660_22137.cpp:25:3: error: 'cout' was not declared in this scope
   cout<<a<<" "<<b<<" "<<c<<endl;
   ^
0_0_18833660_22137.cpp:25:28: error: 'endl' was not declared in this scope
   cout<<a<<" "<<b<<" "<<c<<endl;
                            ^