练习44

最新推荐文章于 2025-04-30 22:15:00 发布

IamFiora

最新推荐文章于 2025-04-30 22:15:00 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/IamFiora/article/details/72828846

本文通过一个C++示例展示了基类与派生类之间的函数覆盖与调用过程。在程序中定义了两个类：BaseClass 和 DerivedClass，并在每个类中实现了 fn1 和 fn2 函数。通过指针和对象的方式调用了这些函数，演示了多态性。

#include <iostream>
using namespace std;

class BaseClass
{
public:
void fn1();
void fn2();
};
void BaseClass::fn1()
{
cout << "调用基类的函数fn1()" << endl;
}
void BaseClass::fn2()
{
cout << "调用基类的函数fn2()" << endl;
}

class DerivedClass : public BaseClass
{
public:
void fn1();
void fn2();
};
void DerivedClass::fn1()
{
cout << "调用派生类的函数fn1()" << endl;
}

void DerivedClass::fn2()
{
cout << "调用派生类的函数fn2()" << endl;
}

int main()
{
DerivedClass aDerivedClass;
DerivedClass *pDerivedClass = &aDerivedClass;
BaseClass *pBaseClass = &aDerivedClass;

aDerivedClass.fn1();
aDerivedClass.fn2();
pBaseClass->fn1();
pBaseClass->fn2();
pDerivedClass->fn1();
pDerivedClass->fn2();
return 0;
}