C++学习(15)

 1 //下面是private继承举例
 2 #include<iostream.h>
 3 class A{
 4     private:    
 5         int a1;
 6     protected:
 7         int a2;
 8     public:
 9         int a3;
10         A(int x1,int x2,int x3){
11             a1=x1;
12             a2=x2;
13             a3=x3;
14         }
15         ~A(){}
16 };
17 
18 class B:private A{
19     private:
20         int b1;
21     protected:
22         int b2;
23     public:
24         int b3;
25         B(int x1,int x2,int x3,int y1,int y2,int y3):A(x1,x2,x3){
26             b1=y1;
27             b2=y2;
28             b3=y3;
29         }
30         ~B(){}
31 
32         void Print()const{
33             //cout<<"a1="<<a1<<endl;//非法
34             cout<<"a2="<<a2<<endl;
35             cout<<"a3="<<a3<<endl;
36             cout<<"b1="<<b1<<endl;
37             cout<<"b2="<<b2<<endl;
38             cout<<"b3="<<b3<<endl;
39         }
40 };
41 
42 void Show(A &myA,B &myB){
43     //cout<<"myA.a1="<<myA.a1<<endl;//非法
44     //cout<<"myA.a2="<<myA.a2<<endl;//非法
45     cout<<"myA.a3="<<myA.a3<<endl;//非法
46 
47     //cout<<"myB.a1="<<myB.a1<<endl;//非法
48     //cout<<"myB.a2="<<myB.a2<<endl;//非法
49     //cout<<"myB.a3="<<myB.a3<<endl;//非法
50     //cout<<"myB.b1="<<myB.b1<<endl;//非法
51     //cout<<"myB.b2="<<myB.b2<<endl;//非法
52     cout<<"myB.b3="<<myB.b3<<endl;
53 }
54 
55 int main(){
56     return 0;
57 }