重载和覆盖方法
本帖最后由 红莲教主 于 2016-5-12 10:37 编辑笔记：重载方法是在一个类中，覆盖发生在基类和子类之间
问题：看不懂
F:\Q\方法覆盖和方法重载\main.cpp|86|warning: deleting object of polymorphic class type 'Animal' which has non-virtual destructor might cause undefined behaviour [-Wdelete-non-virtual-dtor]|
找到解决办法了，就是把Animal类的析构函数变为virtual ~Animal();
#include <iostream>
#include <string>
using std::cout;
using std::endl;
using std::string;
class Animal
{
public:
Animal(string name);
~Animal();
void eat(); //用来测试重载
void eat(string food); //用来测试重载
void say(); //用来测试覆盖
virtual void run(); //用来测试覆盖
private:
string name ;
};
Animal::Animal(string name)
{
this->name = name ;
}
Animal::~Animal()
{
}
void Animal::eat()
{
cout<<"我是个吃货，我正在吃东西！"<<endl;
}
void Animal::eat(string food)
{
cout<<"我在吃"<<food<<endl;
}
void Animal::say()
{
cout<<"我在跟你打招呼，(*^__^*) 嘻嘻……"<<endl;
}
void Animal::run()
{
cout<<"我在追着你跑哦，我要咬死你"<<endl;
}
class Dog : public Animal
{
public:
Dog(string name);
~Dog();
void say();
virtual void run(); //此处virtual可以不写，virtual会继承，virtual方法不能再次变为非virtual方法
};
Dog::Dog(string name):Animal(name)
{
}
Dog::~Dog()
{
}
void Dog::say()
{
cout<<"我在汪汪汪。。。"<<endl;
}
void Dog::run()
{
cout<<"我跑一会儿，撒一泡尿。。"<<endl;
}
int main()
{
Animal* dog = new Dog("小白");
dog->say();
dog->run();
dog->eat();
dog->eat("粑粑");
delete dog ;
return 0 ;
}
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