C++ class 和 struct 可以相互继承吗
C++ class 和 struct 可以相互继承吗?
#include <iostream>
#include <string>
namespace
{
class A
{
public:
std::string name = "小明";
};
struct B :public A
{
int age = 12;
};
class C :public B
{
public:
std::string gender = "男";
};
void showStuCInfo(const C &c)
{
std::cout << "姓名:" << c.name << std::endl
<< "性别:" << c.gender << std::endl
<< "年龄:" << c.age << std::endl;
}
}
int main()
{
C stu;
showStuCInfo(stu);
C* xiaoMing_c = &stu;
B* xiaoMing_b = xiaoMing_c;
A* xiaoMing_a1 = xiaoMing_b;
A* xiaoMing_a2 = xiaoMing_c;
std::cout << std::endl;
showStuCInfo(*xiaoMing_c);
std::cout << std::endl;
std::cout << "姓名:" << xiaoMing_b->name << std::endl
<< "年龄:" << xiaoMing_b->age << std::endl;
std::cout << std::endl;
std::cout << "姓名:" << xiaoMing_a1->name << std::endl;
std::cout << std::endl;
std::cout << "姓名:" << xiaoMing_a2->name << std::endl;
return 0;
}
输出:
姓名:小明
性别:男
年龄:12
姓名:小明
性别:男
年龄:12
姓名:小明
年龄:12
姓名:小明
姓名:小明
可以看出,他们两个之间没有生殖隔离,可以相互继承。唯一区别,一个是默认 public
,一个是默认private
。