/* The following code example is taken from the book * "C++ Templates - The Complete Guide" * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002 * * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include <iostream>#include <string>#include <cstdlib>#include "stack4.hpp"int main(){    try {        Stack<int,20>         int20Stack;     // stack of up to 20 ints        Stack<int,40>         int40Stack;     // stack of up to 40 ints        Stack<std::string,40> stringStack;    // stack of up to 40 strings        // manipulate stack of up to 20 ints        int20Stack.push(7);        std::cout << int20Stack.top() << std::endl;        int20Stack.pop();        // manipulate stack of up to 40 strings        stringStack.push("hello");        std::cout << stringStack.top() << std::endl;         stringStack.pop();        stringStack.pop();    }    catch (std::exception const& ex) {        std::cerr << "Exception: " << ex.what() << std::endl;        return EXIT_FAILURE;  // exit program with ERROR status    }}