foo.cc: In function 'int main()':
foo.cc:5:2: error: 'cin' was not declared in this scope
    5 |  cin>>n;
      |  ^~~
foo.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | using namespace std;
foo.cc:10:4: error: 'cout' was not declared in this scope
   10 |    cout<<" ";
      |    ^~~~
foo.cc:10:4: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:14:4: error: 'cout' was not declared in this scope
   14 |    cout<<"*";
      |    ^~~~
foo.cc:14:4: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:16:3: error: 'cout' was not declared in this scope
   16 |   cout<<endl;
      |   ^~~~
foo.cc:16:3: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:16:9: error: 'endl' was not declared in this scope
   16 |   cout<<endl;
      |         ^~~~
foo.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
  +++ |+#include <ostream>
    1 | using namespace std;

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