C++构造顺序

#include <iostream>using namespace std;class AA {public:AA() { cout << "AA::AA()" << endl; }~AA() { cout << "AA::~AA()" << endl; }};class BB {public:BB() { cout << "BB::BB()" << endl; }~BB() { cout << "BB::~BB()" << endl; }};class CC : public AA {public:CC() { cout << "CC::CC()" << endl; }~CC() { cout << "CC::~CC()" << endl; }private:BB bb;};int main(void){CC cc;return 0;}

 

输出结果:

 

AA::AA()

BB::BB()

CC::CC()

CC::~CC()

BB::~BB()

AA::~AA()

 

构造顺序:

1. 基类对象构造

2. 类成员构造

3. 构造函数调用