# cpp

**Repository Path**: rouchie/cpp

## Basic Information

- **Project Name**: cpp
- **Description**: 记录平时遇到的CPP知识点
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-02-13
- **Last Updated**: 2023-02-13

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

- [cpp](#cpp)
  - [子类虚函数私有化](#子类虚函数私有化)

# cpp
## 子类虚函数私有化
>privateVirtual.cpp
```
/* 
    子类虚函数私有化，则子类无法直接调用虚函数，必须通过父类来调用
*/
#include <iostream>

class A {
    public:
        virtual void hello() = 0;
};

class B : public A {
    private:
        virtual void hello() {
            std::cout << "B hello" << std::endl;
        }
}

class C : public B {
    private:
        virtual void hello() {
            std::cout << "C hello" << std::endl;
        }
}

class D : public B {
    public:
        virtual void hello() {
            std::cout << "C hello" << std::endl;
        }
}

int main()
{
    A * p0 = new B();
    A * p1 = new C();
    A * p2 = new D();

    p0->hello();
    p1->hello();
    p2->hello();

    return 0;
}
```