View Compilation Error

0_0_20008796_1114.cpp:1:1: error: 'include' does not name a type
 include <iostream>
 ^
0_0_20008796_1114.cpp: In function 'int main()':
0_0_20008796_1114.cpp:8:8: error: 'cin' was not declared in this scope
  while(cin>>ch&&ch!='@'){
        ^
0_0_20008796_1114.cpp:10:12: error: 'cout' was not declared in this scope
   if(flag) cout<<endl;
            ^
0_0_20008796_1114.cpp:10:18: error: 'endl' was not declared in this scope
   if(flag) cout<<endl;
                  ^
0_0_20008796_1114.cpp:12:20: error: 'cout' was not declared in this scope
   for(i=1;i<n;i++) cout<<" ";
                    ^
0_0_20008796_1114.cpp:13:3: error: 'cout' was not declared in this scope
   cout<<ch<<endl;
   ^
0_0_20008796_1114.cpp:13:13: error: 'endl' was not declared in this scope
   cout<<ch<<endl;
             ^