protect.cpp

Thinking in C++ 2nd edition source code which are all the cores of the book Thinking in C++ second e

//: C14:Protect.cpp {O}
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// The protected keyword
#include <fstream>
using namespace std;

class Base {
  int i;
protected:
  int read() const { return i; }
  void set(int I) { i = I; }
public:
  Base(int I = 0) : i(I) {}
  int value(int m) const { return m*i; }
};

class Derived : public Base {
  int j;
public:
  Derived(int J = 0) : j(J) {}
  void change(int x) { set(x); }
}; ///:~