3:Never treat arrays polymorphically.(More Effective C++)

1#include<iostream>

2

3usingnamespacestd;

4

5classBST

6{

7private:

8inta;

9

10public:

11BST(intn) : a(n){};

12intgetData() {returna; }

13friend ostream&operator<<(ostream&os, BST&bst);

14};

15

16ostream&operator<<(ostream&os, BST&bst)

17{

18cout<<bst.getData();

19returnos;

20}

21

22classBalancedBST :publicBST

23{

24private:

25intnumber;

26

27public:

28BalancedBST(intn1,intn2) : BST(n1), number(n2){}

29};

30

31voidprint(BST b[],intcount)

32{

33for(inti=0; i<count; i++)

34{

35cout<<b[i]<<endl;

36}

37}

38

39intmain()

40{

41BalancedBST bb1(1,3);

42BalancedBST bb2(2,4);

43BalancedBST a[2]={bb1, bb2};

44BST b[2]={bb1, bb2};

45print(a,2);

46print(b,2);

47

48cin.get();

49return0;

50}原文链接: https://www.cnblogs.com/zhtf2014/archive/2011/06/07/2074532.html

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