詳解C++ 中const修飾虛函數的實例演示

本篇文章是詳解C++ 中const修飾虛函數的實例演示，希望通過錯新技術頻道小編的介紹，我們能夠徹底掌握如何使用它，有需要的朋友可以進入下文參考哦。

C++ 中const修飾虛函數實例詳解

【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() constTest::print() constTest::print()Test::print()*/

備註：一切皆在代碼中。

總結：const修飾成員函數，也屬於函數重載的一種範疇。

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