c++怎么在运行时获取一个类的类型信息RTTI_c++运行时类型识别与typeid用法

#include <iostream>
#include <typeinfo>
<p>class Base {
public:
virtual ~Base() {} // 必须有虚函数才能对指针/引用正确识别派生类型
};</p><p>class Derived : public Base {};</p>
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                <p>int main() {
Base* ptr = new Derived;</p><pre class='brush:php;toolbar:false;'>// 使用 typeid 获取实际类型
std::cout << "指针声明类型: " << typeid(ptr).name() << std::endl;
std::cout << "所指对象实际类型: " << typeid(*ptr).name() << std::endl;

delete ptr;
return 0;

Base* b1 = new Base;
Base* b2 = new Derived;
<p>if (typeid(<em>b1) == typeid(</em>b2)) {
std::cout << "类型相同" << std::endl;
} else {
std::cout << "类型不同" << std::endl; // 会输出这个
}</p>

Base* ptr = new Derived;
Derived* d = dynamic_cast<Derived*>(ptr);
if (d) {
    std::cout << "成功转换为 Derived" << std::endl;
}