/in/foo.cc: In member function 'void CComplex::print()':
/in/foo.cc:11:4: error: 'cout' was not declared in this scope
    cout<<x<<endl;
    ^~~~
/in/foo.cc:11:13: error: 'endl' was not declared in this scope
    cout<<x<<endl;
             ^~~~
/in/foo.cc:13:4: error: 'cout' was not declared in this scope
    cout<<x<<"+"<<y<<"i"<<endl;
    ^~~~
/in/foo.cc:13:26: error: 'endl' was not declared in this scope
    cout<<x<<"+"<<y<<"i"<<endl;
                          ^~~~
/in/foo.cc:15:4: error: 'cout' was not declared in this scope
    cout<<x<<y<<"i"<<endl;
    ^~~~
/in/foo.cc:15:21: error: 'endl' was not declared in this scope
    cout<<x<<y<<"i"<<endl;
                     ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:33:2: error: 'cin' was not declared in this scope
  cin>>x1>>y1;
  ^~~