C++ 中const修饰虚函数实例详解
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#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(); } |
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#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 */ |
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#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。
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原文链接:http://www.cnblogs.com/Braveliu/p/3622124.html