duplicate.cpp

来自「很经典的书籍」· C++ 代码 · 共 35 行

//: C09:Duplicate.cpp
// Shows duplicate subobjects
#include <iostream>
using namespace std;

class Top {
  int x;
public:
  Top(int n) { x = n; }
};

class Left : public Top {
  int y;
public:
  Left(int m, int n) : Top(m) { y = n; }
};

class Right : public Top {
  int z;
public:
  Right(int m, int n) : Top(m) { z = n; }
};

class Bottom : public Left, public Right {
  int w;
public:
  Bottom(int i, int j, int k, int m)
  : Left(i, k), Right(j, k) { w = m; }
};

int main() {
  Bottom b(1, 2, 3, 4);
  cout << sizeof b << endl; // 20
} ///:~