阅读程序1

#include <iostream>
using namespace std;
class BASE
{
private:
    char c;
public:
    BASE(char n):c(n) {}
    virtual ~BASE()
    {
        cout<<c;
    }
};
class DERIVED:public BASE
{
private:
    char c;
public:
    DERIVED(char n):BASE(n+1),c(n) {}
    ~DERIVED()
    {
        cout<<c;
    }
};
int main()
{
    DERIVED d('X');
    return 0;
}

运行结果：

心得：

析构函数调用顺序，先调用派生类析构函数，后调用基类构造函数。若不使用虚析构函数，则派生类析构函数将不被调用。