text: //: C10:Header1.h
  // From Thinking in C++, 2nd Edition
  // Available at http://www.BruceEckel.com
  // (c) Bruce Eckel 2000
  // Copyright notice in Copyright.txt
  #ifndef HEADER1_H
  #define HEADER1_H
  namespace MyLib {
    extern int x;
    void f();
    // ...
  } 
  
  #endif // HEADER1_H ///:~
  