c++继承中的父子纠葛

先看下面一段代码：

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#include <iostream>

class Base {
public:
    int a = 1;
    virtual void print(int n = 2) {
    }
};
class Derive:public Base{
    public:
        int b=3;
        virtual void print(int n = 10)override {
            std::cout << "Derive :"<<b + n << std::endl;
        }
};
 int main(){
     Base *arr = new Derive[10];
     arr[7].print();
     delete[] arr;

     Base *ptr = new Derive();
     ptr->print();
     delete ptr;
}
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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia-plus根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

僕は新世界の神となる!