C++学习(16)

 1 //基类和派生类的析构函数
 2 #include<iostream.h>
 3 class A{
 4     protected:
 5         int a1;
 6         float a2;
 7     public:
 8         A(int x1=0,float x2=0){
 9             a1=x1;
10             a2=x2;
11         }
12         A(A &a){
13             a1=a.a1;
14             a2=a.a2;
15         }
16         ~A(){
17             cout<<"类A的析构函数调用"<<endl;
18         }
19 };
20 
21 class B:public A{
22     private:
23         int b1;
24         float b2;
25     public:
26         B(int x1=0,float x2=0,int y1=0,float y2=0):A(x1,x2){
27             b1=y1;
28             b2=y2;
29         }
30         B(B &b):A(b.a1,b.a2){
31             b1=b.b1;
32             b2=b.b2;
33         }
34         ~B(){
35             cout<<"类B的析构函数调用"<<endl;
36         }
37 };
38 int main(){
39     B myB;
40     B myOtherB(myB);
41     return 0;
42 }