C++ 中const修饰虚函数实例详解

转载  2017-06-01   投稿:lqh   我要评论
这篇文章主要介绍了C++ 中const修饰虚函数实例详解的相关资料,需要的朋友可以参考下
C++ 中const修饰虚函数实例详解 【1】程序1
#include <iostream> using namespace std; class Base { public: virtual void print() const = 0; }; class Test : public Base { public: void print(); }; void Test::print() { cout << "Test::print()" << endl; } void main() { // Base* pChild = new Test(); //compile error! // pChild->print(); }
【2】程序2
#include <iostream> using namespace std; class Base { public: virtual void print() const = 0; }; class Test : public Base { public: void print(); void print() const; }; void Test::print() { cout << "Test::print()" << endl; } void Test::print() const { cout << "Test::print() const" << endl; } void main() { Base* pChild = new Test(); pChild->print(); } /* Test::print() const */
【3】程序3
#include <iostream> using namespace std; class Base { public: virtual void print() const = 0; }; class Test : public Base { public: void print(); void print() const; }; void Test::print() { cout << "Test::print()" << endl; } void Test::print() const { cout << "Test::print() const" << endl; } void main() { Base* pChild = new Test(); pChild->print(); const Test obj; obj.print(); Test obj1; obj1.print(); Test* pOwn = new Test(); pOwn->print(); } /* Test::print() const Test::print() const Test::print() Test::print() */
备注:一切皆在代码中。 总结:const修饰成员函数,也属于函数重载的一种范畴。 感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!

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