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class Animal { public: virtual void speak() {cout << “动物在说话” << endl;} };

vfptr - 虚函数指针 v - virtual f - function ptr - pointer

Animal 内部结构 vfptr

vftable

vftable - 虚函数表 v - virtual f - function table - table

&Animal::speak

class Cat:public Animal { public: virtual void speak() {cout << “小猫在说话” << endl;} };

Cat 内部结构重写Animal之后 vfptr

vftable

&Cat::speak

Embedded files

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