C++ 继承中的构造和析构原则

#include 
using namespace std;



class Parent {
public:
    Parent(const char* p) {
        cout << "父类的构造函数" << p << endl;
    }
    void printP() {
        printf("我是父类函数printP()！n");
    }
    ~Parent() {
        cout << "父类析构函数" << endl;
    }
protected:
    int a;
    int b;
private:
};

class Child : public Parent {
public:
    Child():Parent("aaa") {
        a = 0; b = 0; c = 0;
        cout << "子类的构造函数" << endl;
    }
    void printC() {
        printf("我是子类函数printC()！n");
    }
    ~Child() {
        cout << "子类析构函数" << endl;
    }
protected:
private:
    int c;
};



void playObj() {
    //Parent p1("ddd");

    // 没有基类哪有派生类
    Child c1; // 子类先调用父类的构造函数，然后再调用子类自己的构造函数
}

void main() {

    playObj();

    system("pause");
}