runoob_22_typeinfo

/*
 * @Author: by777
 * @Date: 2025-03-24 17:06:23
 * @LastEditors: by777
 * @LastEditTime: 2025-03-24 17:11:44
 * @FilePath: /cxx_stl/runoob_22.cpp
 * @Description: https://www.runoob.com/cplusplus/cpp-libs-typeinfo.html
 * 
 * Copyright (c) 2025 by by777, All Rights Reserved. 
 */
#include <iostream>
#include <typeinfo>// 提供了运行时类型识别（RTTI，Run-Time Type Identification）功能。
// RTTI 允许程序在运行时确定对象的类型。这是通过使用 typeid 运算符和 type_info 类实现的
using namespace std;

class Base{
public:
    virtual void show(){
        std::cout<<"Base show"<<std::endl;
    }
};

class Derived: public Base{
public:
    void show() override{ std::cout<<"Derived show"<<std::endl;}
};

int main(int argc, const char** argv) {
    Base *basePtr = new Derived();
    Base *basePtr2 = new Base();
    std::cout<<"Type of basePtr: "<<typeid(*basePtr).name()<<std::endl;
    std::cout<<"Type of basePtr2: "<<typeid(*basePtr2).name()<<std::endl;
    if(typeid(*basePtr) == typeid(Derived)){
        cout<<"basePtr is of type Derived"<<endl;
    }else{
        cout<<"basePtr is not of type Derived"<<endl;
    }
    delete basePtr;
    delete basePtr2;
    return 0;
}