/* Code for exercise 8.5. |  | "C++ Solutions--Companion to The C++ Programming Language, Third Edition" | by David Vandevoorde; Addison-Wesley 1998; ISBN 0-201-30965-3. | | Permission to use, copy, modify, distribute and sell this software | and its documentation for any purpose is hereby granted without fee. | The author makes no representations about the suitability of this | software for any purpose.  It is provided "as is" without express or | implied warranty. `----------------------------------------------------------------------*/#include <iostream>#include <cstdlib>int level = 0;void f(int throw_level) {   ++level;   if (throw_level==level)      throw level;   else      f(throw_level);}int main(int argc, char* argv[]) {   try {      if (argc<2 or std::atoi(argv[1])<1)         throw 0;      else         f(std::atoi(argv[1]));   } catch (int depth) {      std::cout << "Caught level "                << depth << " exception.\n";   }   return 0;}