/in/foo.cc: In function 'int main()':
/in/foo.cc:9:3: error: expected ';' before 'for'
   for(i=1;i<=n;i++)
   ^~~
/in/foo.cc:9:12: warning: statement has no effect [-Wunused-value]
   for(i=1;i<=n;i++)
           ~^~~
/in/foo.cc:9:19: error: expected ';' before ')' token
   for(i=1;i<=n;i++)
                   ^
/in/foo.cc:15:4: error: 'cout' was not declared in this scope
    cout<<n<<"  ";
    ^~~~