摘要：
1 #include<iostream> 2 using namespace std; 3 class Shape 4 { 5 public: 6 Shape(){} 7 ~Shape(){} 8 virtual float getArea() {} 9 }; 10 class Circle:pub 阅读全文
摘要：
1 #include<iostream> 2 using namespace std; 3 class BaseClass 4 { 5 public: 6 virtual void fn1(); 7 void fn2 (); 8 }; 9 void BaseClass::fn1() 10 { 11 阅读全文