多个函数的构造和析构总结

思考

如下有2个类，A和B。我们在B类中声明了两个A类：_a1和_a2。

class A

class A {
public:
    A(int a, int b, int c) {
        cout << "A(int a, int b, int c)" << endl;
    }
    ~A(){
        cout<<"~A()"<<endl;
    }

private:
    int _a;
    int _b;
    int _c;
};

class B

class B {
public :
    B() : _a1(1, 2, 3), _a2(1, 4, 9) {
        cout << "B()" << endl;
    }

    ~B() {
        cout << "~B()" << endl;
    }

private:
    A _a1;
    A _a2;
};