实例
#include <iostream> using namespace std; class Base1 {//基类Base1,构造函数有参数 public: Base1(int i) { cout << "Constructing Base1 " <<i<< endl; } }; class Base2 {//基类Base2,构造函数有参数 public: Base2(int j) { cout << "Constructing Base2 " <<j<< endl; } }; class Base3 {//基类Base3,构造函数无参数 public: Base3() { cout << "Constructing Base3 *" << endl; } }; class Derived: public Base2, public Base1, public Base3 { public: Derived(int a, int b, int c, int d): Base1(a), Base2(b), member1(c), member2(d)//此处的次序与构造函数的执行次序无关 {} private: Base1 member1; Base2 member2; Base3 member3; }; int main() { Derived obj(1,2,3,4); return 0; }
结果
Constructing Base2 2 Constructing Base1 1 Constructing Base3 * Constructing Base1 3 Constructing Base2 4 Constructing Base3 *
根据继承顺序,先用接受到对应的值去初始化,调用基类的构造函数。然后按照子类成员声明顺序,调用相应的构造函数。
标签:Constructing,派生类,C++,Base1,Base2,基类,构造函数 From: https://www.cnblogs.com/uacs2024/p/18057277