example21.cpp

来自「Advanced Internet Programming Lecture 2 」· C++ 代码 · 共 29 行

#include <iostream>
using namespace std;

class base {
  int i, j;
public:
  void set(int a, int b) { i=a; j=b; }
  void show() { cout << i << " " << j << "\n";}
};

// Public elements of base are private in derived.
class derived : private base {
  int k;
public:
  derived(int x) { k=x; }
  void showk() { cout << k << "\n"; }
};

int main()
{
  derived ob(3);

  ob.set(1, 2); // error, can't access set()
  ob.show(); // error, can't access show()

  return 0;
}